arachnida arachnid • arachnidan · · · Info · Definitions · Characters · · arachnida · · Text Latin · · Script 9 · · Length 4 · · Syllables Definitions · · · (noun) a large class of arthropods including spiders and ticks and scorpions and daddy longlegs; have four pairs of walking legs and no wings. Synonyms: Arachnida, class Arachnida. · · Noun Definition 1 Characters · · a latin small letter a U+0061 c latin small letter c U+0063 d latin small letter d U+0064 h latin small letter h U+0068 i latin small letter i U+0069 n latin small letter n U+006E r latin small letter r U+0072