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plural alcids
(ornithology) A bird of the family Alcidae, including auks, auklets, razorbills, dovekies, guillemots, and puffins. quotations
Some alcids remain underwater as long as two minutes, exceptionally even longer, and dive to depths of thirty metres.
1977, Jan Hanzák, Jiří Formánek, translated by Olga Kuthanová, The Illustrated Encyclopedia of Birds, London, published 1992, page 177