| EY | egg yolk; epidemiological year |
|---|---|
| EYA | egg yolk agar |
| LD-EYA | Lombard-Dowell egg yolk agar |
| LD-NEYA | Lombard-Dowell neomycin egg yolk agar |
| NEY | neomycin egg yolk [agar] |
| SME | Stalk median eminence |
|---|---|
| TYB | TEST Yolk Buffer |
| VYS | Visceral yolk sac |
| YST | Yolk Sac Tumor |
| Yp | Yolk protein |
| yolk stalk | A narrow tube present in the early embryo that connects the midgut of the embryo (through the umbilical opening) to the yolk sac outside the embryo. Later in development, the yolk stalk is usually obliterated but a remnants of it may persist, most commonly as a finger-like protrusion from the small intestine known as meckel's diverticulum. Found in 2-4% of people, meckel's diverticulum may become inflamed much like the appendix and require surgical removal. The yolk stalk is also called the umbilical duct, vitelline duct, or oomphalomesenteric duct. (12 Dec 1998) |
|---|
| celery stalk metaphyses | <radiology> Irregularity of metaphyses, primarily of long bones due to congenital infection (ToRCHS), especially rubella Differential diagnosis: osteopathia striata (Voerhaave syndrome) (12 Dec 1998) |
|---|---|
| pituitary stalk section | Transection of the neurovascular connection between the hypothalamus and the pituitary gland. (05 Mar 2000) |
| connecting stalk | body stalk |
| stalk | A stem. Usually refers to the pituitary stalk that connects the pituitary gland to the hypothalamus. (16 Dec 1997) |
| stalk-eyed | <zoology> Having the eyes raised on a stalk, or peduncle; opposed to sessile-eyed. Said especially of podophthalmous crustaceans. Stalked-eyed crustaceans. <zoology> See Podophthalmia. Source: Websters Dictionary (01 Mar 1998) |
| stalk of epiglottis | The lower end or pedicle of the cartilage of the epiglottis, attached to the superior notch of the thyroid cartilage. Synonym: petiolus epiglottidis. (05 Mar 2000) |
| infundibular stalk | The neural component of the pituitary stalk that contains nerve tracts passing from the hypothalamus to the pars nervosa. Synonym: infundibular stalk. (05 Mar 2000) |
| optic stalk | The constricted proximal portion of the optic vesicle in the embryo; it develops into the optic nerve. Pineal stalk, the attachment of the pineal body to the roof of the third ventricle; it contains the pineal recess of the third ventricle. Pituitary stalk, a process comprising the tuberal part investing the infundibular stem that attaches the hypophysis to the tuber cinereum at the base of the brain. Yolk stalk, the narrowed connection between the intraembryonic gut and the yolk sac; its walls are splanchnopleure. Synonym: umbilical duct, vitelline duct, vitellointestinal duct. (05 Mar 2000) |
| white yolk | Yolk consisting of much finer particles than those of yellow yolk; thin layers of it lie between the zones of yellow yolk and form the latebra. (05 Mar 2000) |
| egg yolk | The stored nutrient of the egg and the yellow portion of the egg of a bird. (12 Dec 1998) |
| yellow yolk | The chief constituent of the yolk in a bird's egg; it consists of relatively coarse particles of stored food materials and is laid down in concentric zones with interposed thin layers of white yolk. (05 Mar 2000) |
| yolk | 1. The yellow part of an egg; the vitellus. 2. <zoology> An oily secretion which naturally covers the wool of sheep. <anatomy> Yolk cord, the umbilical vesicle. See Unbilical. Origin: OE. Yolke, yelke, yolke, yelke, AS. Geoloca, geoleca, fr. Geolu yellow. See Yellow Alternative forms: yelk. Source: Websters Dictionary (01 Mar 1998) |
| yolk cell | <cell biology> In those eggs in which the yolk is not distributed evenly (telolecithal eggs) the cells formed when cleavage reaches the yolk region can be termed yolk cells. (18 Nov 1997) |
| yolk cells | Primitive embryonic cell's lying between the endoderm and mesoderm; they probably give rise to the endothelium of vitelline vessels. (05 Mar 2000) |
| yolk cleavage | Segmentation of the vitellus. (05 Mar 2000) |
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