in ornithology, a particular shape of a bird’s nest; in reference to Bald Eagles, used to mean the interior of a basin-shaped nest surrounded by a perimeter of sticks, usually lined with grasses and other soft materials to cradle eggs and nestlings; often used to refer to the small indentation where eggs are laid (see egg cup); sometimes spelled “bole,” an archaic Old English (pre-Shakespeare) and Germanic spelling for a basin; most sources on Bald Eagle nests use the modern spelling “bowl” (e.g. M.V. Stalmaster The Bald Eagle, p. 53; American Eagle Foundation), while the earliest usage with the archaic spelling “bole” seems to have appeared on the internet in the late 1990s