brachium(redirected from brachium opticum)
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1. Anatomy the arm, esp the upper part
2. a corresponding part, such as a wing, in an animal
3. Biology a branching or armlike part
Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005
The upper arm or forelimb, from the shoulder to the elbow.
A ray of a crinoid.
A tentacle of a cephalopod.
Either of the paired appendages constituting the lophophore of a brachiopod.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.