1The action, state, or fact of adhering to a person or thing; especially steadfast support, allegiance. Also occasionally: an instance of this.
2A group of adherents or supporters; a following. rare after 17th century.
adherency/ədˈhɪərənsɪ/ /ədˈhɪər(ə)nsɪ/ /adˈhɪərənsɪ/
Late 16th century; earliest use found in Geoffrey Fenton (c1539–1608), translator and administrator in Ireland. From post-classical Latin adhaerentia adherence; compare -y, -ency. Compare earlier adherent.