entering group

entering group

[′en·tər·iŋ ‚grüp]
(organic chemistry)
An atom or group that becomes bonded to the main portion of the substrate during a chemical reaction.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
It was also a good day for Turkmenistan, who created history by entering Group III for the first time, while Hong Kong all but sealed a return to Group II.
The source added that the entering group included various age groups, many injured and patients who were provided by urgent humanitarian aid and transported them to the prepared camps.
Anybody can find them out by entering Group in the Cultivar name field and press 'Search'!
"We have taken the first step of entering Group III, and now we have to ensure we stay back in the group."
Colbourne has been entering groups in the competition for the past three years.