What does derm mean?
'Derm' is an informal noun used as shorthand for skin, particularly the dermis, the layer of living tissue beneath the outermost epidermis. It appears most often in casual medical and cosmetic contexts — among dermatologists, nurses, aestheticians, and patients discussing procedures such as injections, grafts, or laser treatments that operate at or just below the skin's surface. By extension, especially in North American and Australian colloquial speech, 'derm' also serves as a friendly clip of 'dermatologist', so someone might say they have 'a derm appointment' booked for next week. The word carries no strong connotation of its own: its register is relaxed and professional-casual rather than slangy or vulgar. Its brevity makes it handy in conversation, though careful writing generally favors the full terms 'skin' or 'dermis'. Understanding 'derm' also unlocks a whole family of related words — from 'hypodermic' to 'taxidermy' — all built on the same Greek root for skin.
Informal term for the skin, especially the dermis layer beneath the epidermis.
"The injection is delivered just under the derm."
Conversational rather than clinical register; formal writing prefers 'dermis'.
Colloquial short form of dermatologist, a doctor who specializes in conditions of the skin.
"My derm recommended switching to a gentler cleanser."
Chiefly North American and Australian informal speech.
The plural is regular but rare; when referring to multiple dermatologists it appears mainly in very casual speech.
"Both derms agreed the mole looked benign."
That little word on your skincare bottle — 'derm' — is a direct descendant of the ancient Greek word for skin, the same root hiding inside 'hypodermic' and 'taxidermy'.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of derm
'Derm' derives from the Greek 'derma', meaning skin or hide, which itself comes from the verb 'deresthai', to flay or peel. The Greek root entered scientific Latin and spread through European medical vocabulary in compounds such as 'epidermis', 'dermatology', and 'hypodermic'. English clipped these learned forms into the standalone informal 'derm', which now functions both as a name for the skin and as a colloquial shortening of 'dermatologist'.
How derm is actually used
'Derm' is informal and conversational, common among medical professionals and in casual speech about skincare; it would be out of place in formal clinical writing, where 'dermis' or 'skin' is preferred. As a clipped form of 'dermatologist' it is chiefly North American and Australian colloquial usage.
Easily confused with derm
A 'dorm' is a residence hall where students sleep, while a 'derm' refers to skin or, informally, a dermatologist.