hyp·si·cra·ni·al \|hipsə|krānēəl\adjective orhyp·si·cra·nic\-nik\ Etymology: German hypsikran hypsicranial (from hyps- + Greek kranion cranium) + English -ial or -ic — more at cranium : having a high skull with a length-height index of 75 or over • hyp·si·cra·ny\ˈ ̷ ̷ ̷ ̷ˌkrānē\noun-es