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(invertebrate zoology)
The three rays opposite the madreporite in starfish.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.



the three humanities of grammar, rhetoric, and logic, which constituted the first and most important group of the seven liberal arts during the Middle Ages. The trivium was taught in the faculties of arts of universities and at Jesuit colleges.

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.
References in periodicals archive ?
Tom Lash, Trivium's Chief Operating Officer, stated that "BDA provided a comprehensive effort to ensure that the N&F acquisition was successfully completed.
Trivium Technologies, Inc., formed in 2000 and based in Cleveland, Ohio, has developed the next-generation brightness optimization films for LCD displays.
But there is one fundamental thing Trivium must address urgently if they aspire to join the metal elite - the bloke who twiddles the knobs on their mixing desk.
All of which rendered Trivium's set-list virtually irrelevant as it was a feat in itself working out which song they were actually playing.
For your chance to win a pair of tickets to see Trivium at the Barfly on December 13 text 80908.