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 ?
Despite the additional information provided by the electronic travel aids, the participants stressed that it is important to stay alert and to be attentive to the layout of the route, which they had to explore with the assistance of a dog guide or long cane, and the course and texture of foot and cycle paths, roads, intersections, and crosswalks.
The Sonic Pathfinder: An electronic travel aid for the vision impaired.

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