-idanin zoological appellatives, n. and adj., formed on -id3 with suffix -an, meaning ‘of or pertaining to’, or ‘a member of’ the group designated by the suffix -ida or -idæ; as arachnidan (f.Arachnida) =arachnid; ichneumonidan (f.Ichneumonidæ) =ichneumonid.
-idan/ɪdən/suffix.
ORIGIN: from -id3 + -an.
Zoology. Forming adjectives and nouns with the senses ‘of or pertaining to’, ‘a member of’ a particular family (in -idae) or class (in -ida), as arachnidan, carabidan.