noun.
A genus of Alcidæ; the guillemots and murres: used with various restrictions for any of the slender-billed birds of the auk family, as U. troile, the common foolish murre or guillemot, and U. grylle, the black guillemot.
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noun.
murres
Word Usage
"Wind-eggs that are called by some cynosura and uria are produced chiefly in summer."