What does sinister in medical terms mean?

Sinister in medical terms means "left". It is the opposite of "dexter", which means "right".

Some examples of the use of "sinister" in medical terms include:

- Sinister hemiplegia: Paralysis of the left side of the body.

- Sinister nephrectomy: Surgical removal of the left kidney.

- Sinister mastectomy: Surgical removal of the left breast.

The word "sinister" comes from the Latin word "sinister", which means "left" or "unlucky". It is thought to have originated from the fact that the left hand was considered to be unlucky in many ancient cultures.