a. Zool. Also anti-amb-. [f. ANT- + AMBULACRAL.] Opposite to what is ambulacral. (In Echinoderms it sometimes happens that the ambulacral zones do not extend from one pole of the body to the other. Where the ambulacral zone ends, the antambulacral begins, as in the apex of a sea-urchin, or the upper side of a star-fish.)
1870. Rolleston, Anim. Life, 142. The antiambulacral surface.
1877. Huxley, Anat. Inv. Anim., 553. [In a Starfish] the ambulacral, and the opposite, or antambulacral faces are of equal extent.
