gladius

noun2

1. •
   (historical) A Roman sword roughly two feet long.

   • Finally, the Romans made the gladius—sharp, of highly-tempered steel, and strongly piercing—the first real sword (Figs. 17, 18, 19), of which only five specimens are now known to exist. — 1882
2. •
   A pen, a hard internal bodypart of certain cephalopods, made of chitin-like material.

   • From the Cretaceous of North America fossilised gladii in the enigmatic genus Tusoteuthis have been estimated to give a mantle length (body size) of 1.8m, just less than that of the giant squid’s. — 2017