From French ptérion, from ptère (“wing of the sphenoid bone”), from Ancient Greek πτερόν (pterón, “wing”).
pterion (plural pterions or pteria)
- (anatomy) The point corresponding with the posterior end of the sphenoparietal suture; known as the weakest part of the skull.
- 1969, Vladimir Nabokov, Ada or Ardor, Penguin 2011, p. 349:
- Then standing before a closet mirror, he put the automatic to his head, at the point of the pterion, and pressed the comfortably concaved trigger.