SEMIBREVE
Etymology
Noun
semibreve (plural semibreves)
(music) A musical note four beats long in 4/4 time; a whole note (US)
Coordinate terms
• breve
• crotchet
• minim
• quaver
• semiquaver
• demisemiquaver
• hemidemisemiquaver
Source: Wiktionary
Sem"i*breve`, n. Etym: [Pref. semi- + breve: cf. F. semi-breve, It.
semibreve.] [Formerly written semibref.] (Mus.)
Definition: A note of half the time or duration of the breve; -- now
usually called a whole note. It is the longest note in general use.
Source: Webster’s Unabridged Dictionary 1913 Edition