Wiktionary

mouthline

English edit

Etymology edit

mouth +‎ line

Noun edit

mouthline (plural mouthlines)

  1. The line formed by a creature's closed mouth.
    • 1986, Robert T. Bakker, The dinosaur heresies:
      Traditionally, duckbill dinosaurs have been portrayed as cheekless, with the mouthline running from chin to ear […]
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