adjective.
(of a motion) in the direction of contraction of a muscle. (E.g. extension of the lower arm via the elbow joint while contracting the triceps and other elbow extensor muscles; closing of the jaw while flexing the masseter).
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
adjective.
having a common center
Word Usage
"When it comes to location, the value of properties generally conforms to what I call the concentric circle theory."