"large, black swimming and diving bird," early 14c., cormeraunt, from Old French cormarenc (12c., Modern French cormoran), from Late Latin corvus marinus "sea raven" + Germanic suffix -enc, -ing. The -t in English probably is from confusion with words in -ant. See corvine + marine (adj.). The birds are proverbially voracious, hence the word was applied to greedy or gluttonous persons (1530s).
Proto-Indo-European root meaning "body of water."
It forms all or part of: aquamarine; Armorica; beche-de-mer; cormorant; mare (n.2) "broad, dark areas of the moon;" marina; marinate; marine; mariner; maritime; marsh; mere (n.1) "lake, pool;" Merlin; mermaid; merman; meerschaum; meerkat; morass; Muriel; rosemary; submarine; ultramarine; Weimar.
It is the hypothetical source of/evidence for its existence is provided by: Latin mare; Old Church Slavonic morje, Russian more, Lithuanian marės, Old Irish muir, Welsh mor "sea;" Old English mere "sea, ocean; lake, pool," German Meer "sea."
The spelling was influenced by Latin albus "white." The name was extended by 17c. English sailors to a larger sea-bird (order Tubinares), which are not found in the North Atlantic. [In English the word also formerly was extended to the frigate-bird.] These albatrosses follow ships for days without resting and were held in superstitious awe by sailors. The figurative sense of "burden" (1936) is from Coleridge's "Rime of the Ancient Mariner" (1798) about a sailor who shoots an albatross and then is forced to wear its corpse as an indication that he alone, not the crew, offended against the bird. The prison-island of Alcatraz in San Francisco Bay is named for pelicans that roosted there. In Dutch, stormvogel; in German Sturmvogel "storm-bird."