\Trop"ic*al\, a. [Cf. L. tropicus of turning, Gr. ?.
See {Tropic}, n.]
1. Of or pertaining to the tropics; characteristic of, or
   incident to, the tropics; being within the tropics; as,
   tropical climate; tropical latitudes; tropical heat;
   tropical diseases.
2. [From {Trope}.] Rhetorically changed from its exact
   original sense; being of the nature of a trope;
   figurative; metaphorical. --Jer. Taylor.
         The foundation of all parables is some analogy or
         similitude between the tropical or allusive part of
         the parable and the thing intended by it. --South.
{Tropic month}. See {Lunar month}, under {Month}.
{Tropic year}, the solar year; the period occupied by the sun
   in passing from one tropic or one equinox to the same
   again, having a mean length of 365 days, 5 hours, 48
   minutes, 46.0 seconds, which is 20 minutes, 23.3 seconds
   shorter than the sidereal year, on account of the
   precession of the equinoxes.