Yolk gland

Also found in: Medical.
Related to Yolk gland: uterus
(Zool.) a special organ which secretes the yolk of the eggs in many turbellarians, and in some other invertebrates. See Illust. of Hermaphrodite in Appendix.

See also: Yolk

Webster's Revised Unabridged Dictionary, published 1913 by G. & C. Merriam Co.
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To confirm the effects of E2 and BPA on yolk glands, in situ hybridization of the sections was performed with Dryg, a molecular marker of the yolk gland (Hase et al., 2003) (Figs.
The yolk gland is a special organ in planarians: it produces a source of nutrition for offspring in a cocoon containing the composite egg.
In the planarians, E2 could not influence the regeneration of yolk glands in a dose-dependent manner: 1 ppb of E2 inhibited yolk gland regeneration to a higher extent than did 10 or 100 ppb of E2.