Acanthosis Nigricans
/ˌæk.ænˈθoʊ.sɪs nɪˈɡrɪk.ənz/noun
Acanthosis nigricans is a skin condition causing darker, thicker, velvety patches, commonly in body folds.
Did you know?Its name is a clinical visual description rather than a supernatural label: Greek supplied the idea of thickening, while Latin supplied “blackening.”
Etymological Timeline
Proto-Indo-European
PIE
*ak-
“Sharp, pointed, or piercing; the reconstructed root behind several terms for points and thorns”
Ancient Greek
Greek
ἄκανθα (ákantha)
“Thorn, spine, or prickle; also used for the thorny acanthus plant”
Medical Greek
Greek
ἀκάνθωσις (akánthōsis)
“A condition involving thornlike or thickened growth; formed with -osis, meaning a condition or process”
19th Century
Medical Latin
acanthosis
“A pathological thickening of the epidermis”
Classical Latin
Latin
niger; nigricans
“Black; becoming or appearing black”
Late 19th–20th Century
Medical Latin
acanthosis nigricans
“Acanthosis characterized by dark pigmentation or dark appearance; the modern clinical term”