{Embryonic sac} or {Embryonic vesicle} (Bot.), the vesicle within which the embryo is developed in the ovule; -- sometimes called also {amnios sac}, and {embryonal sac}. [1913 Webster]
The Collaborative International Dictionary of English. 2000.
embryonal carcinoma — n a highly malignant cancer of the testis * * * a highly malignant germ cell tumor that is a primitive form of carcinoma, probably of primitive embryonal cell derivation; it may be found either in pure form or as part of a mixed germ cell tumor… … Medical dictionary
amnios sac — Embryonic Em bry*on ic, a. (Biol.) Of or pertaining to an embryo; embryonal; rudimentary. [1913 Webster] {Embryonic sac} or {Embryonic vesicle} (Bot.), the vesicle within which the embryo is developed in the ovule; sometimes called also {amnios… … The Collaborative International Dictionary of English
Embryonic sac — Embryonic Em bry*on ic, a. (Biol.) Of or pertaining to an embryo; embryonal; rudimentary. [1913 Webster] {Embryonic sac} or {Embryonic vesicle} (Bot.), the vesicle within which the embryo is developed in the ovule; sometimes called also {amnios… … The Collaborative International Dictionary of English
yolk sac tumor — a malignant germ cell tumor of children that represents a proliferation of both yolk sac endoderm and extraembryonic mesenchyme. It is characterized by a labyrinthine glandular pattern with a papillary projection into a sinuslike space;… … Medical dictionary
infantile embryonal carcinoma — yolk sac tumor … Medical dictionary
juvenile embryonal carcinoma — yolk sac tumor … Medical dictionary
Embryonic — Em bry*on ic, a. (Biol.) Of or pertaining to an embryo; embryonal; rudimentary. [1913 Webster] {Embryonic sac} or {Embryonic vesicle} (Bot.), the vesicle within which the embryo is developed in the ovule; sometimes called also {amnios sac}, and… … The Collaborative International Dictionary of English
Embryonic vesicle — Embryonic Em bry*on ic, a. (Biol.) Of or pertaining to an embryo; embryonal; rudimentary. [1913 Webster] {Embryonic sac} or {Embryonic vesicle} (Bot.), the vesicle within which the embryo is developed in the ovule; sometimes called also {amnios… … The Collaborative International Dictionary of English
Teratoma — Classification and external resources Micrograph of a teratoma showing tissue from all three germ layers: mesoderm (immature cartilage left upper corner of image), endoderm (gastrointestinal glands cente … Wikipedia
tumor — 1. Any swelling or tumefaction. 2. SYN: neoplasm. 3. One of the four signs of inflammation (t., calor, dolor, rubor) enunciated by Celsus. [L. t., a swelling] acinar cell t. a … Medical dictionary
