triradiate

adj

1. (not-comparable)Having or consisting of three rays; radiating in three directions from a central point; three-rayed, trifurcate.

   “Three beautiful little semicircular horny saws, arranged in a triradiate manner, so that their edges meet in the centre.”

   “The triradiate spores of Asterosporium.”

noun

1. A triradiate sponge-spicule.

   “The triradiates are regular with straight, conical, and gradually sharp-pointed rays, measuring 60 - 150 μm in length and 8 - 14 μm thick at the base.”