Tri-nōc'tial, a.
a. [Lat. trinoctialis, for three nights, from tri, q. v., and nox, noctis, night.] Lasting during three nights; comprising the period of three nights.
a. [Lat. trinoctialis, for three nights, from tri, q. v., and nox, noctis, night.] Lasting during three nights; comprising the period of three nights.