Final answer:
A primigravida is a woman who is pregnant for the first time(a).
Step-by-step explanation:
A primigravida is defined as a woman who (a) is pregnant for the first time. The term originates from Latin, where 'primi-' refers to 'first' and 'gravida' indicates a pregnant woman. This term is widely used in the medical field, particularly in obstetrics, to describe a woman during her initial pregnancy. It is important for healthcare providers to know if a woman is a primigravida because her care needs may differ from those of a woman who has been pregnant before.