interlunar

[ in-ter-loo-ner ]
/ ˌɪn tərˈlu nər /

adjective

pertaining to the moon's monthly period of invisibility between the old moon and the new.

Origin of interlunar

First recorded in 1590–1600; inter- + lunar
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019