The Collaborative International Dictionary of English v.0.48:

Gnomic \Gnom"ic\, Gnomical \Gnom"ic*al\, a. [Gr. ?, fr. ?: cf.
   F. gnomique. See Gnome maxim.]
   Sententious; uttering or containing maxims, or striking
   detached thoughts; aphoristic.
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         A city long famous as the seat of elegiac and gnomic
         poetry.                                  --G. R. Lewes.
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   Gnomic Poets, Greek poets, as Theognis and Solon, of the
      sixth century B. C., whose writings consist of short
      sententious precepts and reflections.
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The Collaborative International Dictionary of English v.0.48:

Gnomical \Gnom"ic*al\, a. [See Gnomon.]
   Gnomonical. --Boyle.
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