-id

-id¹

a suffix of nouns that have the general sense "offspring of, descendant of," occurring originally in loanwords from Greek (Atreid; Nereid), and productive in English on the Greek model, esp. in names of dynasties, with the dynasty's founder as the base noun (Abbasid; Attalid), and in names of periodic meteor showers, with the base noun usually denoting the constellation or other celestial object in which the shower appears (Perseid).

[ < L -id-, s. of -is < Gk: fem. patronymic suffix; or < L -ides < Gk: masc. patronymic suffix]

-id²

a suffix occurring in English derivatives of modern Latin taxonomic names, esp. zoological families and classes; such derivatives are usually nouns denoting a single member of the taxon or adjectives with the sense "pertaining to" the taxon: arachnid; canid.

[ < Gk -ides -ID¹, as sing. of NL -ida -IDA or -idae -IDAE]

-id³

var. of -ide: lipid.

-id⁴

a suffix occurring in descriptive adjectives borrowed from Latin, often corresponding to nouns ending in -or¹: fetid; humid; pallid.

[ < L -idus]

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