Deutoplasm is the lifeless food matter in the cytoplasm of an ovum or a cell, as distinguished from the active or true protoplasm; yolk substance. ...
• (n.) The lifeless food matter in the cytoplasm of an ovum or a cell, as distinguished from the active or true protoplasm; yolk substance; yolk.
Deu'to·plasm noun [ Prefix deuto- + Greek ... form.] (Biol.) The lifeless food matter in the cytoplasm of an ovum or a cell, as distinguished from the active or true protoplasm; yolk substance; yolk. 
Type: Term Pronunciation: dū′tō-plazm Definitions: 1. The yolk of a meroblastic egg; the nonliving material in the cytoplasm, especially that stored in the ovum as food for the developing embryo, the most common types being lipoid droplets and yolk granules. Synonyms: deuteroplasm
the reserve nutritive material, as a yolk granule, in the ovarian cytoplasm.