Delivery, vertex: In a vertex delivery, the top of the baby’s head comes first. The vertex here refers to the top of the head. The word “vertex” in Latin means a “whirlpool, whirlwind, top of the mountain, or the top of the head.” Why “top of the head”? Because the hairs on the top of the head often form a whorl, a whirl-like pattern.
- D and C
D and C: Stands for dilatation and curettage. This is a very common gynecologic procedure in which the cervix of the uterus is expanded (dilated) so the cervical canal and endometrium (the uterine lining) can be scraped off with a spoon-shaped instrument called a curet or curette. This is a relatively minor procedure.
- D (domain)
D (domain): Abbreviation for domain, a discrete portion of a protein with its own function. The combination of domains in a single protein determines its overall function.
- D & C
D & C: Dilatation and curettage, a minor operation in which the cervical canal is expanded enough (dilatation) to permit the cervical canal and uterine lining to be scraped with a small spoon-shaped instrument called a curette (curettage).
Deltoid: The muscle, roughly triangular in shape, that stretches from the collarbone (clavicle) over the shoulder to the upper bone of the arm (humerus). It contracts to move the arm up from the side.
- Delusional parasitosis
Delusional parasitosis: A mistaken belief that one is infested by parasites such as mites, lice, fleas, spiders, worms, or other organisms. See also: Parasitosis, Morgellon’s disease.