lanugo
RareTechnical/Medical
Definition
Meaning
The fine, soft hair that covers the body of a human fetus or newborn baby.
A covering of very fine, soft, downy hair, especially in medical/zoological contexts referring to the first coat of hair on a mammal or to fine body hair associated with certain medical conditions (e.g., anorexia).
Linguistics
Semantic Notes
Primarily a technical term in biology, medicine, and anthropology. In everyday contexts, it's almost exclusively used to describe the hair on fetuses and newborns. Its use regarding the fine hair grown in cases of severe malnutrition is a specific medical application.
Dialectal Variation
British vs American Usage
Differences
No significant difference in meaning or usage between UK and US English.
Connotations
Scientifically neutral, though can carry a sensitive connotation when discussing conditions like anorexia nervosa.
Frequency
Equally rare in both varieties. More likely encountered in specialized medical or academic texts.
Vocabulary
Collocations
Grammar
Valency Patterns
[be covered with] lanugo[have] lanugo[shed] lanugo[develop] lanugoVocabulary
Synonyms
Strong
Neutral
Weak
Vocabulary
Antonyms
Phrases
Idioms & Phrases
- “No common idioms.”
Usage
Context Usage
Business
Never used.
Academic
Used in medical, biological, and anthropological papers discussing fetal development or certain health conditions.
Everyday
Extremely rare. Might be used by parents, midwives, or healthcare professionals discussing newborn characteristics.
Technical
The primary register. Used precisely in obstetrics, pediatrics, dermatology, and zoology.
Examples
By CEFR Level
- Newborn babies often have soft hair called lanugo.
- The midwife explained that the fine lanugo on the baby's skin is normal and will shed soon.
Learning
Memory Aids
Mnemonic
Imagine a tiny, NEW baby GOing home wrapped in a soft, LAnugo-covered blanket. 'LANUGO' sounds like 'LANe of NEW GO-ing' hair.
Conceptual Metaphor
A NATURAL PROTECTIVE COATING (like the down on a baby bird).
Watch out
Common Pitfalls
Translation Traps (for Russian speakers)
- Avoid confusing with 'пушок' in all adult contexts—'lanugo' is specifically fetal/medical. 'Пушок' is broader. The term 'лануго' is a direct loanword used in Russian medical terminology.
Common Mistakes
- Using it to describe normal adult body hair (which is vellus or terminal hair).
- Pronouncing it with a hard 'g' (/ɡ/) instead of a soft one (/ɡəʊ/ or /ɡoʊ/).
Practice
Quiz
In which context is the term 'lanugo' most accurately used?
FAQ
Frequently Asked Questions
No. While both are fine hairs, 'peach fuzz' on adults is vellus hair. Lanugo specifically refers to the first, often unpigmented, hair coat on a fetus or newborn, which is typically shed before or shortly after birth.
Most, but not all, babies are born with some lanugo, especially if they are premature. It is most prominent on the back, shoulders, and face and usually sheds within the first few weeks after birth.
Not in the true developmental sense. However, the term is used in medicine to describe the growth of fine, downy hair (similar in appearance) on the body in severe malnutrition, as seen in anorexia nervosa, as the body attempts to insulate itself.
It is thought to help hold the vernix caseosa (a waxy, protective skin coating) in place on the fetus, providing insulation and protection for the delicate skin in the amniotic fluid.
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