plastid plastic wrap • plastidium · · · Info · Definitions · Characters · · plastid · · Text Latin · · Script 7 · · Length 2 · · Syllables Definitions · · · (noun) any of various small particles in the cytoplasm of the cells of plants and some animals containing pigments or starch or oil or protein. · · Noun Definition 1 Characters · · a latin small letter a U+0061 d latin small letter d U+0064 i latin small letter i U+0069 l latin small letter l U+006C p latin small letter p U+0070 s latin small letter s U+0073 t latin small letter t U+0074