Amnionic – Definition & Meaning

Amnionic is a term that is commonly used in biology and medicine, particularly in the field of obstetrics and gynecology. It refers to the amnion, which is a membrane that surrounds and protects the developing fetus during pregnancy. In this article, we will explore the definition and meaning of amnionic, as well as its origin, associations, synonyms, and antonyms.


Amnionic is an adjective that describes anything related to the amnion, which is the innermost membrane that surrounds the embryo in the uterus. It is filled with amniotic fluid, which provides a cushioning effect and protects the fetus from external shocks and pressure. The amnion also helps to regulate the temperature and humidity of the environment in which the fetus develops.


The term amnionic is derived from the Greek word “amnion,” which means “lamb’s skin.” This is because the amnion is thin and delicate, similar to the skin of a lamb. The word was first used in English in the early 20th century.

Meaning in different dictionaries

The meaning of amnionic is consistent across different dictionaries. For example, the Merriam-Webster dictionary defines it as “of or relating to the amnion,” while the Oxford English Dictionary defines it as “relating to or resembling the amnion.”


Amnionic is often associated with pregnancy and childbirth, as it is a key component of the fetal membrane. It is also associated with fetal development, as the amniotic fluid and membrane play important roles in protecting and nourishing the developing fetus.


Some synonyms of amnionic include amniotic, amnial, and amniotomic. These terms all refer to the amnion or something related to it.


There are no direct antonyms of amnionic, as it is a very specific term that refers to a particular structure in the body. However, some related terms that could be considered antonyms include non-amniotic and extra-amniotic.

The same root words

The root word of amnionic is “amnion,” which is also the root word of other related terms such as amniocentesis (a medical procedure that involves extracting amniotic fluid for testing) and amniotic sac (the structure that contains the amniotic fluid and surrounds the developing fetus).

Example Sentences

  1. The amnionic fluid provides a protective environment for the developing fetus.
  2. The amnionic membrane ruptured, signaling the onset of labor.
  3. The doctor recommended an amniocentesis to test for genetic abnormalities.
  4. The baby was born with the amniotic sac still intact, which is a rare occurrence.
  5. The amnial tissue was carefully examined under a microscope to check for any abnormalities.
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