processionary
adjective
of, relating to, or moving in a procession
noun
a processionary moth
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
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Examples from the Web for processionary
Historical Examples of processionary
So says the Processionary, who every evening spends his little capital of silk on enlarging a shelter that is often new to him.
Insect AdventuresJ. Henri Fabre