1584 R. Scot Discouerie Witchcraft xiii. xviii. 313 Aristotle himselfe teacheth to make a chicken haue foure legs, and as manie wings, onlie by a double yolked eg.

1599 T. Moffett Silkewormes 66 Whited alike, and yellow yolked all.

1649 C. Hoole Easie Entrance Lat. Tongue 187/2 A two-yolked egg, Ovum géminum.

1737 Brit. Librarian Mar. 180 Next we have Observations upon white yolked Eggs, and Eggs all Yolk.

1859 Todd's Cycl. Anat. & Physiol. V. 51/2 Animals..with the large-yolked ova.

1889 Hardwicke's Sci.-gossip 25 118/1 I know that ‘double-yolked’ eggs are not uncommon.

1900 Q. Jrnl. Microsc. Sci. Feb. 75 Small-yolked, holoblastic eggs.

1961 Amer. Midland Naturalist 66 233 Reproductive potential can be calculated accurately on the basis of the number of enlarged yolked follicles.

1991 T. H. Clutton-Brock Evol. Parental Care i. 8 Parental care includes..the production of large, heavily yolked eggs, the care of eggs or young inside or outside the parent's body, [etc.]

2008 Independent on Sunday 15 Apr. (New Review) 53/1 Three gently baked, brightly yolked eggs topped with a few folds of harshly smoked salmon and a lick of cream in a cast-iron fry pan.

1745 Dublin Jrnl. 11 June Matted, Yolked and Sandy Wool.

1828 Amer. Jrnl. Improvem. Useful Arts 1 304 The above proportions of the composition or mixture, and the time of operating with the same, will vary according to the wool to be cleansed, being more or less yolked or greasy.

1893 C. McIvor Hist. & Devel. of Sheep Farming i. x. 78 The lighter yolked Australian Merino.

1899 Agric. Jrnl. (Agric. Dept. Cape Good Hope) 5 Jan. 24 No man can hope to get white-yolked fleeces from sheep and pastures that have for generations turned off a beautiful yellow-yolked wool.

1913 Farmer & Settler (New S. Wales) 21 Oct. 6 (headline) Good fleeces, but heavily-yolked.

1961 Pastoral Rev. June 709/1 The Bluff's top reserve and sale rams were an excellent lot, with thick 58's wool, well conditioned yet not over-yolked.