allometry

noun Biology.

1. growth of a part of an organism in relation to the growth of the whole organism or some part of it.
2. the measurement or study of this growth.

noun

1. the study of the growth of part of an organism in relation to the growth of the entire organism
2. a change in proportion of any of the parts of an organism that occurs during growth

n.

1. The study of the change in proportion of various parts of an organism as a consequence of growth.