Dictionary of Human Evolution and Biology

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1. relative growth of a part in relation to another part or to the entire organism.

2. the study of such relationships, such as brain size and body size, or basal metabolic rate and longevity.

3. Any relationship of size between two body parts y and x that can be expressed by the power formula y c bxa, where c, b and a are parameters, the intercept, the slope, and an exponential term, respectively. Allometry frequently employs regression methods to express the relationship between variables. Adjective: allometric. Aka heterauxesis, heterochrony.

Cf. correlation.

See J.S. Huxley, interspecific allometry, and intraspecific allometry.

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