Definition of prognathous in English:

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Pronunciation: /ˈpräɡnəTHəs/
Pronunciation: /präɡˈnāTHəs/


1(Especially of a person) having a projecting lower jaw or chin.
1.1(Of a jaw or chin) projecting.
Example sentences
  • Although the head is worn, a detail shows that the lower part of the face extends down to the trachea at the base of the neck; this roughened area, too massive to be simply a prognathous jaw, must instead represent a full beard.
  • Exceedingly tall and gaunt with a long, prognathous jaw, he never took his eyes from me as he went over to an accordion wilted across a stool.
  • Enlarged as though in a magnifying mirror, the abundant follicles sprout gut-string stubble as a gentle sleeping smile winks above the prognathous jaw.
1.2(Of an insect) having projecting mouthparts.



Pronunciation: /präɡˈnaTHik/
Example sentences
  • The facial profile was categorized as retrognathic, neutral, or prognathic.
  • Below the orbits, the face is more prognathic - the nose and jaw protrude farther in front of the braincase - than a human face.


Pronunciation: /ˈpräɡnəˌTHizəm/
Example sentences
  • The new skull has a rather unusual combination of features: a flat face, high cheek bones, moderate prognathism, small molars, and it lacks a depression behind the brow ridge.


Mid 19th century: from pro-2 'before' + Greek gnathos 'jaw' + -ous.

For editors and proofreaders

Syllabification: prog·na·thous

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