The Collaborative International Dictionary of English v.0.48:

Virgalieu \Vir"ga*lieu\, n. [Cf. Virgouleuse.] (Bot.)
   A valuable kind of pear, of an obovate shape and with melting
   flesh of delicious flavor; -- more properly called White
   Doyenn['e]. [Written also virgaloo, vergalieu,
   vergaloo, etc.]
   [1913 Webster]