noun. a small northern constellation near Perseus between Andromeda and Aries.
Example sentences of the word triangulum
1. Noun, singular or mass
The eastern milk snake, or Lampropeltis triangulum triangulum, and the scarlet king snake are often mistaken for the coral snake, a venomous species, due to the ring patterns on their skin.
2. Proper noun, singular
Though they reach only about 36 inches in length, Eastern milk snakes (Lampropeltis triangulum triangulum) are the largest nonvenomous, terrestrial snake in the Adirondacks.