What does ontogenesis mean?
Ontogenesis is the process by which an individual organism develops from an early stage, such as a fertilized egg or embryo, into a mature form. It covers changes in structure, function, and organization across the lifespan and is especially important in embryology, developmental biology, and the study of growth. The word is more technical than the general term development and emphasizes the sequence through which a particular individual comes into being and changes over time. In broader, less common use, ontogenesis can describe the origin and development of a being, institution, or other entity. It should not be confused with phylogeny, which concerns evolutionary relationships and the historical development of groups of organisms rather than the growth of one organism. Ontogenesis is therefore a precise term for describing individual biological development as a unified process.
nounThe development of an individual organism from its earliest stage through maturity. More broadly, it can refer to the origin and development of a being or entity.
- The development of an individual organism from conception or an early developmental stage to maturity.
- The origin and progressive development of an individual being or entity.
"The study of ontogenesis examines how a single cell develops into a complex organism."
"Researchers studied ontogenesis in the developing zebrafish to understand how specialized tissues form."
"The novel traces the ontogenesis of its central character from childhood independence to public life."
The plural is grammatical but uncommon; singular usage predominates in biological writing.
"The study compares the ontogeneses of several closely related species."
Every person carries a lifelong record of development in their cells, from the first moments after conception to adulthood.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Where does ontogenesis come from?
The word combines Greek onta, a plural form of on, meaning “being” or “things that exist,” with genesis, meaning “birth,” “origin,” or “production.” Its development reflects the biological distinction between the genesis of an individual and the evolutionary history of a species. The related term ontogeny is especially common in biology for the individual developmental process.
Related word forms
How ontogenesis is actually used
Most common in biology and developmental science. It is formal and technical, and is often interchangeable with development in its primary sense, though it emphasizes the process as a whole.
Easily confused with ontogenesis
Ontogenesis is the process of individual development, whereas ontogeny more specifically denotes that developmental history or pattern.
Ontogenesis concerns the development of an individual organism, while phylogeny concerns the evolutionary history of a group of organisms.