Short "hint"

n. -Either of the two parallels of latitude representing the points farthest north and south at which the Sun can shine directly overhead; Adj: Of, pertaining to, characteristic of, or occurring in described locations.

Watch out! You may see this word with another pronunciation and its meaning is then different.
Used as a noun, listen here, it means: n. -Either of the two parallels of latitude representing the points farthest north and south at which the Sun can shine directly overhead; Adj: Of, pertaining to, characteristic of, or occurring in described locations. Used as an adjective, listen here, it means: Of or relating to an orientation of an organism to an external stimulus, as light, esp. by growth rather than by movement.