agenesis
Definition
- Noun:
- Imperfect development; nondevelopment of a part: A medical and biological term referring to the complete or partial failure of an organ or tissue to develop during embryonic growth.
Usage Examples
- Noun:
- The ultrasound revealed renal agenesis in the fetus.
- Agenesis of the corpus callosum is a congenital condition where the structure connecting the brain's hemispheres is absent.
Advanced Usage
- The term is most frequently used in medical, anatomical, and embryological contexts to describe congenital absences.
- It is often specified by the body part affected, forming compound terms (e.g., , ).
Variants and Related Words
- Agenesia: An alternative noun form with the same meaning.
- Agenetic (adj): Pertaining to or characterized by agenesis.
- The agenetic defect was identified at birth.
Synonyms
- Aplasia: Often used interchangeably, though sometimes distinguished as a partial, rather than complete, failure of development.
- Nondevelopment
- Congenital absence
Notes on Meaning
- Agenesis specifically implies a defect originating during the formation of an organ in the womb. It is not used for the loss of a fully formed part later in life.
- It is a neutral, clinical term and does not describe the cause, which can be genetic, environmental, or unknown.
Noun
-
imperfect development; nondevelopment of a part
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