The Collaborative International Dictionary
Allision
Allision \Al*li"sion\, n. [L. allisio, fr. allidere, to strike or dash against; ad + laedere to dash against.] The act of dashing against, or striking upon.
The boisterous allision of the sea.
--Woodward.
Wiktionary
allision
n. 1 (context nautical English) The striking of a vessel against a fixed object; the act of allide or an instance thereof. 2 (context rare English) The act of dashing against or strike upon.