vitellary /vɪˈtɛləɹi/noun 2adjective 1forms 3 noun2 •The vitelline gland; a gland that produces yolk in some worms.The germary is ventrolaterally joint to the syncytial tissue. Mouth of the vitellary not seen . — 1990 •A cluster of undeveloped eggs within the ovary of a female bird. adjective1 •Vitelline.Vitellary degeneration is recognizable as early as 4 days after injection of HCG. — 1973 formsvitellaries · more vitellary · most vitellary