Liver-vein (The).
A love rhapsody. The liver was anciently supposed to be the seat of love. When Longaville reads the verses, Biron says, in an aside, “This is the liver-vein, which makes flesh a deity.” (Shakespeare: Love’s Labour’s Lost, iv. 3.)
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Entry taken from Dictionary of Phrase and Fable, edited by the Rev. E. Cobham Brewer, LL.D. and revised in 1895.