a. Zool. [f. Gr. τριχώδης hair-like (f. θρίξ, τριχ- hair: see -ODE) + -AL.] Extremely thin: applied to a sponge-spicule.
1888. Sollas in Challenger Rep., XXV. p. lviii. Both the rhabdus and the style may … be … immeasurably thin (trichodal, τριχώδης, hair-like).
