planetical adjective4 •(no longer used) Pertaining to the planets and/or their motions. •(no longer used) Synonym of planetary. •(no longer used) Global.He has also a characteristic rebuke of "planetical" preachers, who were not to be restrained to one parish, but must spread their talents over a whole province or principality. — 1891 •(no longer used) Relating to the earth; terrestrial.They are stated to be the circles of unequal or planetical hours, or one-twelfth part of the time between sunset and sunrise, the division of the night in common use in early times. — 1904