inguinal (adj.)

crystalline base, 1885, coined by German physiologist/chemist Albrecht Kossel from Greek adēn "gland," from PIE root *engw- "internal organ" (see inguinal) + chemical suffix -ine (2). So called because it was derived from the pancreas of an ox.

scientific word-forming element meaning "gland," from Greek adēn "gland," probably from a suffixed form of PIE root *engw- "groin; internal organ" (source also of Latin inguen "groin;" see inguinal).

1839, "gland-like," from medical Latin adenoideus, from Greek adenoeides, from adēn (genitive adēnos) "gland" (from PIE root *engw- "internal organ;" see inguinal) + eidos "form" (see -oid). Adenoids "adenoid growths" is attested by 1856.