noun (plural -tross or -trosses)
Etymology: probably alteration of obsolete alcatrace frigate bird, from Spanish or Portuguese alcatraz pelican, from Arabic al-ghaṭṭās, a kind of sea eagle
Date: 1672
any of a family (Diomedeidae) of large web-footed seabirds that have long slender wings, are excellent gliders, and include the largest seabirds,
2. something that causes persistent deep concern or anxiety, something that greatly hinders accomplishment ; encumbrance
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