hol·o·he·dral \|hälō|hēdrəl, |hōl-\adjective Etymology:hol- + Greek hedra seat + English -al — more at sit of a crystal: having all the faces required by complete symmetry — compare hemihedral, tetartohedral • hol·o·he·drism\ˌ ̷ ̷ ̷ ̷ˈhēˌdrizəm\noun-s • hol·o·he·dry\-ēdrē\noun-es