Denoting an egg with a moderate amount of yolk, as in amphibians. ... Origin: L. Medialis, medial, + G. Lekithos, egg yolk ... (05 Mar 2000) ... 
Type: Term Pronunciation: mē′dē-ă-les′i-thăl Definitions: 1. Denoting an egg with a moderate amount of yolk, as in amphibians.