sb. (a.) Zool. [ad. Gr. τορνωτ-ός adj. rounded with the τόρνος (see TORNUS).] A form of sponge-spicule: see quot.
1888. Sollas, in Challenger Rep., XXV. p. lv. When the rhabdas is very abruptly pointed at each end a rhabdus amphitornota results, which we shall call a ‘tornote.’
