Definitions

1. noun

The study of the development and growth of an organism from the fertilized ovum to the mature adult, or the process of an individual organism’s development from fertilization to adulthood.

“The scientist studied the ontogeny of the species to understand its life cycle.”

2. noun

The pattern or sequence of development of an organism, especially as it relates to the expression of genes.

“The ontogeny of the embryo is closely linked to the expression of its genetic code.”

3. noun

A particular pattern or sequence of development in an organism.

“The ontogeny of the plant’s root system was crucial for its ability to absorb nutrients.”