Opisth- (Opisth-), Opistho (Opistho-)

Opist- (Opisth-) and Opistho (Opistho-) is a Greek prefix that is used in anatomical and medical terminology. It has two main meanings:

1. Dorsal; rear. The prefix indicates that the structure or organ is located on the back surface of the body or organ. For example:

1. Opisthocephalon - posterior part of the brain.

2. Opisthognathism - backward displacement of the lower jaw.

3. Opisthotonus - convulsive extension of the body.

2. The reverse direction of something. The prefix indicates that the process or structure is directed in the opposite direction from the usual one. For example:

1. Opisthodysplasia is a congenital malformation of the kidneys in which the kidney is located in the lumbar region.

2. Opisthoreflux - reflux of bile into the bile ducts.

Thus, the prefix opist-/opistho- indicates the posterior location or reverse direction of anatomical structures and processes. It is widely used in medical terminology to clarify localization and orientation.

Opist-, Opistho is a prefix used in anatomy and medicine to denote the dorsal, posterior, or backward direction of something. It is of Greek origin and comes from the words “opisthos” (back) and “opisth-” (back).

Opistectomy is used to refer to the dorsal, posterior, or reverse side of an organ, for example, opistectomy (posterior hysterectomy) is an operation to remove the uterus through an incision in the posterior wall of the vagina.

Opist can also be used to indicate the opposite direction, for example, when describing the process of hair growth. If the hair grows in the front, then this process is called anagenesis, and if it grows in the back, then opistgenesis.

In addition, opist is used in embryology to denote the development of organs and body systems in the opposite direction, for example, the development of limbs occurs in the opistembryonic direction.

Opistkh-, opista (O- + πστῆς) is a compound morpheme of Greek origin, meaning “dorsal”, “posterior”. Often used with Greek or Latin surnames and foreign place names and organizations derived from them. According to Ozhegov’s Russian spelling dictionary, it is a neologism.

In English dictionaries, opisthis is often interpreted as the definition of the word "opist". The term was coined in the 1960s by Cyrus E. Smith and was originally defined as butt-shaped.