aid

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aid

1. Mountaineering any of various devices such as piton or nut when used as a direct help in the ascent
2. (in medieval Europe; in England after 1066) a feudal payment made to the king or any lord by his vassals, usually on certain occasions such as the marriage of a daughter or the knighting of an eldest son

AID

References in periodicals archive ?
He said that Dubai Hospital has so far succeeded in conducting seven bone conduction hearing aid procedures (for individuals whose skull was thicker than 8 millimeters).
The different styles of hearing aids include custom-molded (completely in the canal, in the ear), behind the ear or bone conduction hearing aids.
Other uses include bone conduction hearing aids where the connectors must be lightweight, small and easy to mount.