brachium(redirected from brachium opticum)
Also found in: Dictionary, Thesaurus, Medical.
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
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.