ˌcanalicuˈlationNat.Hist. [see prec. and -ation.] A canaliculate formation; a minute channelling or grooving. 1880R. 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.