Definition

Noun: - The liquid surrounding and protecting a developing embryo or fetus within the amniotic sac: A clear, slightly yellowish fluid that fills the amniotic sac, providing a cushion against physical shocks, maintaining a stable temperature, and allowing for fetal movement and development.

Usage

• This term is used in medical, biological, and general contexts to refer to the protective fluid in the womb.
• It is a technical term. In everyday conversation, people often refer to it simply as "amniotic fluid" or, in the context of childbirth, as "waters" (e.g., "My waters broke.").

Examples

• The ultrasound showed that the amnionic fluid levels were normal.
• A sample of amnionic fluid can be taken for genetic testing in a procedure called amniocentesis.
• The protective function of the amnionic fluid is crucial for healthy fetal development.

Advanced Usage

• "Amnionic fluid volume (AFV)": A clinical measurement of the amount of amniotic fluid, assessed during pregnancy ultrasounds.
• "Amnionic fluid index (AFI)": A specific method used in ultrasound to quantify the amount of amniotic fluid.

Variants and Related Words

• Amniotic fluid: The more common modern spelling and synonym for "amnionic fluid." Both terms are used interchangeably in medical literature.
• Liquor amnii: A Latin-derived technical term for the amniotic fluid.
• Waters: A common informal term, especially in the phrase "waters breaking," which refers to the rupture of the amniotic sac and the release of this fluid.

Synonyms

• Amniotic fluid
• Waters (informal, in the context of childbirth)

Related Phrases and Idioms

• "To break one's waters" / "For one's waters to break": An idiom describing the rupture of the amniotic sac, signaling the onset of labor.
  • Her amnionic fluid leaked when her waters broke early in the morning.

Noun

1. the serous fluid in which the embryo is suspended inside the amnion
   • before a woman gives birth her waters break