a. Zool. [f. SPIRACUL-UM + -AR.] Of or pertaining to, serving as, a spiracle or spiracles.
1840. F. D. Bennett, Whaling Voy., II. 151. The spiracular canals of spouting-whales.
1848. Proc. Berw. Nat. Club, II. 339. Spiracular lines not very distinct.
1880. Günther, Fishes, 80. They form a valve for the protection of the spiracular orifice of these fishes.
