guest
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guest
1.
a. an actor, contestant, entertainer, etc., taking part as a visitor in a programme in which there are also regular participants
b. (as modifier): a guest appearance
2. a patron of a hotel, boarding house, restaurant, etc.
3. Zoology a nontechnical name for inquiline
Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005
guest
[gest] (chemistry)
Cationic, anionic, or neutral organic, inorganic, or biological substance, bound by means of various interactions (electrostatic, hydrogen bonding, van der Waals, donor-acceptor) within a crystalline or molecular structure. Also known as guest molecule; guest substance.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.