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Hair removal

Hair removal is a biology topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Hair removal rather than just read about it. In short: Hair removal is the deliberate removal of body hair or head hair. This process is also known as epilation or depilation.

Hair removal — main illustration
Hair removal — illustration

Key takeaways

  • Hair removal belongs to biology; place it in that map before memorising details.
  • Learn the definition first, then one example that makes the definition concrete.
  • Connect Hair removal to a quantity you can measure, compute or draw — that is where exam questions come from.
  • Reproduce the core statement of Hair removal from memory before moving on to harder problems.

Reference excerpt

Hair removal is the deliberate removal of body hair or head hair. This process is also known as epilation or depilation. Hair is a common feature of the human body, exhibiting considerable variation in thickness and length across different populations. Hair becomes more visible during and after puberty. Additionally, men typically exhibit thicker and more conspicuous body hair than women. Both males and females have visible body hair on the head, eyebrows, eyelashes, armpits, genital area, arms, and legs. Males and some females may also have thicker hair growth on their face, abdomen, back, buttocks, anus, areola, chest, nostrils, and ears. Hair does not generally grow on the lips, back of the ear, the underside of the hands or feet, or on certain areas of the genitalia. Hair removal may be practiced for cultural, aesthetic, hygienic, sexual, medical, or religious reasons. Forms of hair removal have been practiced in almost all human cultures since at least the Neolithic era. The methods used to remove hair have varied in different times and regions. The term "depilation" is derived from the Medieval Latin "depilatio," which in turn is derived from the Latin "depilare," a word formed from the prefix "de-" and the root "pilus," meaning "hair."

History

For centuries, hair removal has long shaped gender roles, served to signify social status and defined notions of femininity and the ideal "body image". In early periods, the condition of being hairless was mostly done as a way to keep the body clean, using flint, seashells, beeswax and various other depilatory utensils and exfoliator substances, some highly questionable and highly caustic. Ancient Rome also associated hair removal with status: a person with smooth skin was associated with purity and superiority. Removing body hair was done by both men and women. Psilothrum or psilotrum (Ancient Greek: ψίλωθρον) and dropax (Ancient Greek: δρῶπαξ) were depilatories in ancient Greece and Rome. An alipilus (Ancient Greek: παρατίλτριος) was a slave who attended bathers, removing unwanted body hair. The same practice applied to women, who were served by female slaves called παρατίλτριαι (the plural of παρατίλτρια, the feminine form of παρατίλτριος). In Ancient Egypt, besides being a fashion statement for affluent Egyptians of all genders, hair removal served as a treatment for louse infestation, which was a prevalent issue in the region. Very often, they would replace the removed head hair with a Nubian wig, which was seen as easier to maintain and also fashionable. Ancient Egyptian priests also shaved or depilated all over daily, so as to present a "pure" body before the images of the gods. In ancient times, one highly abrasive depilatory paste consisted of an admixture of slaked lime, water, wood-ash and yellow orpiment (arsenic trisulfide); In rural India and Iran, where this mixture is called vajibt, it is still commonly used to remove pubic hair. In other cultures, oil extracted from unripe olives (which had not reached one-third of their natural stage of ripeness) was used to remove body hair. During the medieval period, Catholic women were expected to let their hair grow long as a display of femininity, whilst keeping the hair concealed by wearing a wimple headdress in public places. The face was the only area where hair growth was considered unsightly; 14th-century ladies would also pick off hair from their foreheads to recede the hairline and give their face a more oval form. From the mid-16th century, it is said when Queen Elizabeth I came to power, she made eyebrow removal fashionable. By the 18th century, body hair removal was still considered a non-necessity by European and American women. But in 1760, when the first safety straight razor appeared for men to safely shave their beard and not inadvertently cut themselves, some women allegedly used this safety razor too. It was invented in Paris by the French master cutler Jean-Jacques Perret, author of La pogonotomie, ou L'art d'apprendre à se raser soi-même (Pogonotomy, or The Art of Learning to Shave). It was not until the late 19th century that women in Europe and America started to make hair removal a component of their personal care regime. According to Rebecca Herzig, the modern-day notion of body hair being unwomanly can be traced back to Charles Darwin's book first published in 1871 "The Descent of Man and Selection in Relation to Sex". Darwin's theory of natural selection associated body hair with "primitive ancestry and an atavistic return to earlier less developed forms", writes Herzig, a professor of gender and sexuality studies at Bates College in Maine. Darwin also suggests having less body hair was an indication of being more evolved and sexually attractive. As Darwin's ideas polarized, other 19th century medical and scientific experts started to link hairiness to "sexual inversion, disease pathology, lunacy, and criminal violence". Those connotations were mostly applied to women's and not men's body hair. By the early 20th century, the upper- and middle-class white America increasingly saw smooth skin as a marker of femininity, and female body hair as repulsive, with hair removal giving "a way to separate oneself from cruder people, lower class and immigrant". Harper's Bazaar, in 1915, was the first women's fashion magazine to run a campaign devoted to the removal of underarm hair as "a necessity". Shortly after, Gillette launched the first safety razor marketed specifically for women—the "Milady Décolleté Gillette", one that solves "...an embarrassing personal problem" and keeps the underarm "...white and smooth".

Cultural and sexual aspects

… excerpt ends here. Continue reading the full article.

Illustrations

Hair removal: Anterior view of major and minor (lighter color) body hair growth areas in anatomically typical females and males.
Anterior view of major and minor (lighter color) body hair growth areas in anatomically typical females and males.
Hair removal: Vintage advert for the Milady Décolleté Gillette women's safety razor – 1916
Vintage advert for the Milady Décolleté Gillette women's safety razor – 1916
Hair removal: Leg shaving using a razor
Leg shaving using a razor
Hair removal: Very pronounced upper body hair growth, probably hypertrichosis, on an adult male.
Very pronounced upper body hair growth, probably hypertrichosis, on an adult male.

Worked examples

Example 1 — a first encounter with Hair removal

Start with the simplest possible case. Write down what Hair removal claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In biology, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Hair removal before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Hair removal ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Hair removal

In research
Hair removal appears in biology research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry
Engineering practice reuses Hair removal in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom
Hair removal is common in secondary-school and first-year university syllabi. It links to neighbouring topics Cosmetics, Dermatology, Hair removal, so understanding it makes those chapters shorter.
In everyday life
Look for Hair removal outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.
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How to study Hair removal in 20 minutes

  1. Read the reference excerpt below once, without taking notes.
  2. Close the page and write down what Hair removal means in your own words.
  3. Compare your version with the excerpt and mark what you missed.
  4. Work through the three examples above with pen and paper.
  5. Explain Hair removal out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Hair removal in simple terms?

Hair removal is the deliberate removal of body hair or head hair. This process is also known as epilation or depilation.

Why does Hair removal matter?

Because it connects several biology ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Hair removal?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Hair removal.

Tags

  • Cosmetics
  • Dermatology
  • Hair removal
  • Human hair
  • Laser medicine
  • Plastic surgery

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