be at the plague
An attack made by troops from a besieged position; a sally. / (aviation) An operational flight carried out by a single military aircraft. / An act of venturing out to do a task, etc.
(botany, of a calyx) having all sepals united
(obsolete, idiomatic) To be bothered; to make the effort to do something.
(biology) A group of species with similar karyotypes.
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