combining form (cf. VITELLI-) of VITELLUS, used in a few terms (Biol. and Chem.), as vitello-duct, -intestinal a., -lutein, -phag, -rubin (see quots.).
1888. Rolleston & Jackson, Anim. Life, 647. Internally it opens, when single, into the *vitello-duct, or germ-duct.
1854. Bushnan in Orr’s Circ. Sci., II. 84. A communication is found to have arisen between the yolk and the intestine, by a wide duct termed the *vitello-intestinal duct.
1886. Buck’s Handbk. Med. Sci., II. 247/2. In the red eggs of Maja squinado R. Maly found two kinds of coloring matter, which he named *vitellolutein and vitellorubin. Ibid., 248/1. Vitellolutein is soluble in alcohol to a clear yellow solution.
1904. Science, 8 April, 588/2. There is no satisfactory evidence to show that the cells … are really such, and not dividing cleavage cells or possibly *vitellophags.
1886. Buck’s Handbk. Med. Sci., II. 248/1. *Vitellorubin occurs in an amorphous form, soluble in alcohol to a brown fluid.
