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Definition of Os longum
1. Noun. In limbs of vertebrate animals: a long cylindrical bone that contains marrow.
Exact synonyms: Long Bone
Generic synonyms: Bone, Os
Terms within: Endosteum, Metaphysis
Specialized synonyms: Epiphysis, Diaphysis, Shaft, Arm Bone, Leg Bone
Generic synonyms: Bone, Os
Terms within: Endosteum, Metaphysis
Specialized synonyms: Epiphysis, Diaphysis, Shaft, Arm Bone, Leg Bone
Medical Definition of Os longum
1. One of the elongated bones of the extremities, consisting of a tubular shaft (diaphysis) and two extremities (epiphyses) usually wider than the shaft; the shaft is composed of compact bone surrounding a central medullary cavity. Compare: short bone. Synonym: os longum, pipe bone. (05 Mar 2000)