arachnid arachnean • Arachnida · · · Info · Definitions · Synonyms · Characters · · arachnid · · Text Latin · · Script 8 · · Length Definitions · · · (noun) air-breathing arthropods characterized by simple eyes and four pairs of legs. Synonyms: arachnoid. · · Noun Definition 1 Synonyms · · · arachnoid · · Synonym 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