The generally unidirectional movement of a gas or fluid. / the part of a fluid that moves continuously in a certain direction, especially (oceanography) short for ocean current.

A school that provides board and lodging to some students, but allows others to attend during the day only, like a day school.

plural of gingivitis

(astronomy) A bluish-white star in the constellation Grus; Alpha (α) Gruis. / (astronomy) A bluish-white binary star in the constellation Centaurus; Zeta (ζ) Centauri.