Ma'anar ƙamus na kalmar "craniometry" ita ce nazarin kimiyya da auna ma'aunin kwanyar ɗan adam, musamman dangane da ƙayyadaddun girma, siffar, da ma'auni na sassa daban-daban na kwanyar. Ana amfani da shi sau da yawa don yin nazarin bambance-bambancen ilimin halittar skull a tsakanin al'ummomi daban-daban da kuma gano alakar da ke tsakanin halittar kwanyar da abubuwa kamar kwayoyin halitta, juyin halitta, da cututtuka.