a. [f. TRI- 1 + L. axis AXIS + -AL.] Having three axes: said in Geom. of co-ordinates; in Zool. of sponge-spicules. Also (more regularly) Triaxial a.
1886. Proc. Zool. Soc., 21 Dec., 581. A regular triaxial network is formed.
1891. Cent. Dict., s.v., Triaxal coördinates.
1896. Dk. Argyll, Philos. Belief, 110. The intercalation of triaxial spiculae, at the proper intervals or interspaces.
