lean body mass


mass

 [mas] 1. a lump or collection of cohering particles.2. that characteristic of matter that gives it inertia. Symbol m.atomic mass weight" >atomic weight; see also unit" >atomic mass unit.inner cell mass an internal cluster of cells at the embryonic pole of the blastocyst which develops into the body of the embryo.lean body mass that part of the body including all its components except neutral storage lipid; in essence, the fat-free mass of the body.relative molecular mass technically preferable term for weight" >molecular weight.

fat-free bod·y mass

(FFM) (fat'frē bod'ē mas) Body mass, primarily of muscle and bone, devoid of storage fat; a theoretic entity that contains the small percentage of non-sex-specific essential fat equivalent to approximately 3% of body mass (located chiefly within the central nervous system, bone marrow, and internal organs).
Synonym(s): lean body mass.