plural rami
ˈrā-ˌmī 
: a projecting part, elongated process, or branch: such as
a
: the posterior more or less vertical part on each side of the lower jaw that articulates with the skull
b
: a branch of a nerve
Examples of ramus in a Sentence
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Other features related more closely to the platypus than the echidna have to do with its ramus, or the part of the jaw that attaches to the skull.
—
Elizabeth Rayne, Ars Technica, 7 June 2024
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Elizabeth Rayne, Ars Technica, 7 June 2024
Cite this Entry
“Ramus.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/ramus. Accessed 31 Oct. 2025.
Copy CitationMedical Definition
ramus
noun
ra·mus
ˈrā-məs
plural rami
-ˌmī
: a projecting part, elongated process, or branch: as
a
: the posterior more or less vertical part of the lower jaw on each side which articulates with the skull
b(1)
: the upper more cranial branch of the pubis that extends from the pubic symphysis to the body of the pubis at the acetabulum and forms the cranial part of the obturator foramen
called also superior ramus
(2)
: the thin flat lower branch of the pubis that extends from the pubic symphysis to unite with the ramus of the ischium in forming the inferior rim of the obturator foramen
called also inferior ramus
c
: a branch of the ischium that extends down and forward from the ischial tuberosity to unite with the inferior ramus of the pubis in forming the inferior rim of the obturator foramen
called also inferior ramus
d
: a branch of a nerve see ramus communicans
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