Standard Article


  1. P. Sprent

Published Online: 15 JUL 2005

DOI: 10.1002/0470011815.b2a08003

Encyclopedia of Biostatistics

Encyclopedia of Biostatistics

How to Cite

Sprent, P. 2005. Allometry. Encyclopedia of Biostatistics. 1.

Author Information

  1. Newport-on-Tay, UK

Publication History

  1. Published Online: 15 JUL 2005


Allometry is a study of shape changes associated with size. Most living organisms change shape as they grow in order to overcome biological or physical constraints. Simply, allometry occurs when two size measurements exhibit an approximately linear relationship between their logarithms. Suggestions made for multivariate extensions range from applications of principal component analysis to studies of size variables and shape vectors. The limitations imposed by Euclidean geometry and other disadvantages with these approaches have been removed by considering curvature and tangential directions at a series of points called landmarks and by coordinate transformations.


  • allometry;
  • growth patterns;
  • isometry;
  • shape;
  • size