That department of botany which treats of the forms that the different organs of plants assume, and the laws that regulate their metamorphoses; also applied to animals in same sense.
- Etymological and pronouncing dictionary of the English language. By Stormonth, James, Phelp, P. H. Published 1874. (noun) (n.) (noun)
That branch of science which deals with the form and structure of plants and animals.
- The Winston Simplified Dictionary. By William Dodge Lewis, Edgar Arthur Singer. Published 1919. (noun) (n.) (noun)
The science of the form and structure of plants or animals, as distinct from consideration of the functions.
- A dictionary of scientific terms. By Henderson, I. F.; Henderson, W. D. Published 1920. (noun) (n.) (noun)
The science of the forms assumed by plants and animals.
- The american dictionary of the english language. By Daniel Lyons. Published 1899. (noun) (n.) (noun)
That department of science which treats of forms in organisms.
- Nuttall's Standard dictionary of the English language. By Nuttall, P.Austin. Published 1914. (noun) (n.) (noun)

Usage examples:

Morphology of the Lepidoptera.
- The Life-Story of Insects by Geo. H. Carpenter
Synthetic morphology is yet only in its infancy, let us hope that in a time equal to that which has already expired since the first artificial production of urea, it will have made a progress equal to that of its older sister, synthetic chemistry.
- The Mechanism of Life by St├ęphane Leduc
But in all this work it was the morphology of the creatures that interested him, and the light which their structure threw upon the structure of each other and of their nearest allies.
- Thomas Henry Huxley; A Sketch Of His Life And Work by P. Chalmers Mitchell