from The Century Dictionary.

  • noun A caltrop in which one of the arms is very long and straight. See caltrop, 4.
  • noun In the nomenclature of sponge-spicules, a triæne whose three cladi or prongs project at right angles with the shaft; a simple spicule of the rhabdus type, trifurcate or with three secondary rays at one end, and these rays at light angles with the shaft.


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