The condition of being prognathous; the condition of having a projecting jaw WordNet 3.0 & Open English WordNet

Prognathism, also called Habsburg jaw or Habsburgs' jaw primarily in the context of its prevalence amongst members of the House of Habsburg, is a positional relationship of the mandible or maxilla to the skeletal base where either of the jaws protrudes beyond a predetermined imaginary line in the coronal plane of the skull. Wikipedia

Protrusion of the upper or lower human jaw Wikidata