Polyhydramnios is a medical condition where the amniotic fluid surrounding the baby in the uterus is excessive. Antonyms for this term cannot be provided as it is a specific medical diagnosis that describes a condition, rather than a word that can be compared or contrasted with another. However, opposite adjectives to describe this condition could be insufficient, inadequate, or low instead of excessive or high levels of amniotic fluid. It is essential to note that this condition can pose risks for both the mother and the fetus and must be addressed and properly managed by a medical professional.

The term "Chases sign" refers to a linguistic phenomenon known as synonymy, wherein multiple words or phrases are used interchangeably to convey a similar meaning. Synonyms for "Ch...