The Collaborative International Dictionary of English v.0.48:

Convallariaceae \Convallariaceae\ prop. n.
   One of many subfamilies into which some classification
   systems subdivide the Liliaceae but not widely accepted.

   Syn: family Convallariaceae.
        [WordNet 1.5]

WordNet (r) 3.0 (2006):

Convallariaceae
    n 1: one of many subfamilies into which some classification
         systems subdivide the Liliaceae but not widely accepted
         [syn: Convallariaceae, family Convallariaceae]