Definition of Alcidae
: a family of diving birds (order Charadriiformes) having short wings and tail, webbed feet, a large head and heavy body, and thick compact plumage, being confined to the northern parts of the northern hemisphere, and including the auks, puffins, guillemots, murres, and related forms
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Origin and Etymology of alcidae
New Latin, from Alca, type genus + -idae
First Known Use: 1845
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