planetology noun.
[planɪ'tɒlǝdʒi] E20.[from PLANET noun1 + -OLOGY.]Astronomy. The branch of science that deals with the planets and their evolution.
■ planeto'logic adjective E20. ■ planeto'logical adjective L20. ■ planetologist noun M20. [TahlilGaran] English Dictionary ▲