lunisolar(a = adj.pert) - relating to or attributed to the moon and the sun or their mutual relations;
Resulting from the united action, or pertaining to the mutual relations, of the sun and moon. [1913 Webster]
lunisolar, adj. of or concerning the sun and moon.
Idiom:
lunisolar period a period of 532 years between the repetitions of both solar and lunar cycles. lunisolar year a year with divisions regulated by changes of the moon and an average length made to agree with the solar year.
Etymology:
L luna moon + sol sun