basing

[BASIN.) (O. Scotch.) bā-si-ros-tral, a. [Lat. basis (BASIS), and rostral is = pertaining to the rostrum or bill of a bird.) Situated at the base of the bill. "Several persons have supposed or imagined it [the serrated claw in the Goat-sucker) to be for the purpose of enabling the bird to clear away from between its basiroural bristles the fragments of wings or other parts of lepidopterous insects, which by adhering have clogged them."- Macgillivray : Brit. Birds , vol. iii.,