Nat. Hist. [see prec. and -ATION.] A canaliculate formation; a minute channelling or grooving.
1880. R. B. Watson, in Jrnl. Linn. Soc., XV. No. 82. 98. The slight canaliculation in which the mouth terminates. Ibid., XV. No. 87. 406. A very slight canaliculation on the suture.
