Which of the following describes the condition of having a normal appearance and size of the head?

The term that refers to having a normal appearance and size of the head is "normocephalic." This is a medical descriptor that signifies that an individual's head size and shape fall within the average range for their age and sex. This term is frequently used by healthcare providers during physical examinations to assess whether a patient has any abnormal head shapes or sizes that could indicate underlying health issues.

Microcephaly denotes a condition where the head is significantly smaller than average, often linked to developmental problems. Macrocephaly, on the other hand, refers to an excessively large head, which can be associated with conditions like hydrocephalus or other neurological disorders. Craniosynostosis indicates the premature fusion of one or more cranial sutures, which can affect head shape and size. None of these conditions reflect a normal head appearance, making normocephalic the correct choice.