Final answer:
The accurate term for the absence or abnormal cessation of menstrual periods is spelled as 'amenorrhea'. It is a condition that can arise due to various biological or health factors. The process of menstruation involves the shedding of the uterine lining known as the endometrium.
Step-by-step explanation:
The correct spelling for the term that describes the absence or abnormal cessation of menses is D. amenorrhea.
Amenorrhea is a condition that can occur under various circumstances, such as during pregnancy, while breastfeeding, which has an amenorrhaeic effect due to lactation's impact on the reproductive system, or as a result of health issues.
It's worthwhile to note that not all women experience menstruation, such as trans women, postmenopausal women, and those with amenorrhea, and not all individuals who menstruate identify as women, such as trans men.
Furthermore, menstruation is a process that involves shedding the endometrium of the uterus during the menstrual cycle when fertilization has not occurred, starting with what is commonly known as the menstrual period or menses.