ramus noun. ['reɪmǝs] Pl. -mi [-mʌɪ, -mi:]. M17.
[Latin = branch.]
1. Anatomy.
a. A major branch of a nerve. M17.
ramus communicans [kǝ'mju:nɪkanz], pl. rami communicantes [kǝmju:nɪ'kanti:z] [= communicating] a branch of one nerve that joins another; esp. one joining a sympathetic ganglion with a spinal nerve.
b. An arm or branch of a bone, esp. of the ischium and pubes; either of the two arms of the jawbone. M18.

2. Zoology.
a. Any of various structures in invertebrates that have the form of a projecting arm, often one of two or more that are conjoined or adjacent. M19.
b. A barb of a feather. L19.

[TahlilGaran] English Dictionary ▲