ETYMOLOGY
from Greek ἄγαµ-ος (unmarried) + -ist
EXAMPLE
“…to exhort these spirituall Fathers first to cease from murdering of their owne children to spare the bloud of innocentes, & not to persecute Christ so cruelly in his members, as they do, and furthermore to exhort in like maner these Agamistes, and wilful reiecters of matrimony, to take themselues to lawfull wiues, and not to resist Gods holy ordinaunce, nor encounter his institution with an other contrary institution of theyr own deuising, lest perhappes they preuented by fragilitie, may fall into daunger of suche inconueniences aboue touched …”
From: Actes and Monumentes
By John Foxe, 1570
Lexicophilia 