Webster's 1913 Dictionary
RAMUS
Ra "mus, n.; pl. Rami (. (Nat. Hist. )
Defn: A branch; a projecting part or prominent process; a ramification.
RAMUSCULE
Ra *mus "cule, n. Etym: [L. ramusculus.] (Nat. Hist. )
Defn: A small ramus, or branch.
New American Oxford Dictionary
ramus
ra mus |ˈrāməs ˈreɪməs | ▶noun ( pl. rami |-ˌmī | ) 1 Anatomy an arm or branch of a bone, in particular those of the ischium and pubes or of the jawbone. • a major branch of a nerve. 2 Zoology a structure in an invertebrate that has the form of a projecting arm, typically one of two or more that are conjoined or adjacent. • a barb of a feather. ORIGIN mid 17th cent.: from Latin, literally ‘branch. ’
Oxford Dictionary
ramus
ramus |ˈreɪməs | ▶noun ( pl. rami |ˈreɪmʌɪ, ˈreɪmiː | ) 1 Anatomy an arm or branch of a bone, in particular those of the ischium and pubes or of the jawbone. • a major branch of a nerve. 2 Zoology a structure in an invertebrate that has the form of a projecting arm, typically one of two or more that are conjoined or adjacent. • a barb of a feather. DERIVATIVES ramal adjective ORIGIN mid 17th cent.: from Latin, literally ‘branch ’.
Duden Dictionary
Ramus
Ra mus Substantiv, maskulin Medizin , der |R a mus |der Ramus; Genitiv: des Ramus, Rami lateinisch a Zweig eines Nervs, einer Arterie oder einer Vene b astartiger Teil eines Knochens