Define thermionic. thermionic synonyms, thermionic pronunciation, thermionic translation, English dictionary definition of thermionic. n. An electrically charged particle, especially an electron, emitted by a conducting material at high temperatures. thermâ²iÂ·onâ²ic adj. adj of, relating to,...
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hCG is an abbreviation for a hormone that is naturally produced by a part of the fertilized ovum directly after conception. The letters âhCGâ stand for Human Chorionic Gonadotropin.The pituitary gland produces a very similar hormone known as luteinizing hormone and some experts argue that hCG is produced in the pituitary gland of both men and women.CG is an abbreviation for a hormone that is naturally produced by a part of the fertilized ovum directly after conception. The letters âhCGâ stand for Human Chorionic Gonadotropin.