From The Collaborative International Dictionary of English v.0.48 [gcide]:
1. (Mus.) A note or character of time, equivalent to two semibreves or four minims. When dotted, it is equal to three semibreves. It was formerly of a square figure (as thus: ? ), but is now made oval, with a line perpendicular to the staff on each of its sides; -- formerly much used for choir service. --Moore.
From WordNet (r) 3.0 (2006) [wn]:
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