the.com/tusk
a tooth so ambitious it left the mouth and started running the whole face
means a long, pointed tooth that protrudes well beyond the mouth, as in elephants, walruses, and boars.
from From Old English 'tusc' or 'tux,' related to Old Frisian 'tusk' meaning much the same thing. Beyond that the trail goes cold — its deeper roots are uncertain, possibly tangled with words for 'tooth,' which would make sense for a tooth that grew too big for its job.
true teethTusks are overgrown incisors or canines, not horns
never stopElephant tusks grow throughout their entire lives
handednessElephants favor one tusk like we favor a hand
narwhal twistThat spiral tusk is a sensor-packed tooth piercing the lip
walrus winchWalruses haul their bodies onto ice using tusks