agenesis

Thân thiện

A doctor examines an X-ray showing agenesis of a limb.

Definition

1. 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.

Học thuật

Noun

1. imperfect development; nondevelopment of a part

Từ đồng nghĩa

• agenesia