ˌsefəˈlämə.trē, -i noun
( -es )
Etymology: International Scientific Vocabulary cephal- + -metry; probably originally formed as French céphalométrie
: the science of measuring the head especially for determining the dimensions and proportions characteristic of a particular race, sex, or somatotype or for determining the relation of a fetal head to the maternal pelvic outlet — distinguished from craniometry