exo-

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exo-

[′ek·sō]
(organic chemistry)
A conformation of carbon bonds in a six-membered ring such that the molecule is boat-shaped with one or more substituents directed outward from the ring.
(science and technology)
A prefix denoting outside or outer.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.