tricennal

From mistaken use of Medieval Latin trīcennāle, neuter substantive of Latin trīcennālis (“tricennial”), from trīcennium (“30-year period”) +‎ -ālis (“-al: forming adjectives”), from trīcennis (“30-year”) + -ium (“-ium: forming abstract nouns”), from trīciēs (“30 times”) + annus (“year”) + -is (“forming compound adjectives”). Doublet of tricennial.

tricennal (plural tricennals)

1. (Christianity, obsolete) Synonym of trental, set of 30 requiem masses, the payment for such services.
   • 1537, H. Latimer, Sermon to Clergie, E2:

     Your forefathers sawe somwhat, whiche made this constitution, against the venalitie and sale of Masses, that vnder peine of suspending, no priest shuld sell his sayinge of tricennals, or annals.

• “tricennal, n.”, in OED Online ⁠, Oxford, Oxfordshire: Oxford University Press, launched 2000.

From Latin trīcennālis, from trīcennium (“30-year period”) +‎ -ālis (“-al: forming adjectives”), from trīcennis (“30-year”) + -ium (“-ium: forming abstract nouns”), from trīciēs (“30 times”) + annus (“year”) + -is (“forming compound adjectives”).

tricennal (feminine tricennale, masculine plural tricennaux, feminine plural tricennales)

1. tricennial

• “tricennal”, in Trésor de la langue française informatisé [Digitized Treasury of the French Language], 2012.