If, on the other hand, the maximum circumference is notably smaller, we are entering upon the anomaly of microcephaly.
microcephaly on the contrary shows inferiority of form (smallness, receding forehead, etc.), but not malformation.
Lombroso attributes a series of cases of microcephaly to profound mental impressions occurring during pregnancy.
Pathological terminology includes the following nomenclature: macrocephaly, sub-macrocephaly, submicrocephaly, microcephaly.
Some just show radiation abnormalities—giantism, microcephaly, and the like.
microcephaly mi·cro·ceph·a·ly (mī'krō-sěf'ə-lē)
Abnormal smallness of the head. Also called nanocephaly.