Definify.com
Webster 1913 Edition
Trieterical
Triˊe-ter′ic-al
,Adj.
[L.
trietericus
, Gr. [GREEK], fr. [GREEK] (sc. [GREEK]) a triennial festival; [GREEK] (see Tri-
.) + [GREEK] a year.] Kept or occurring once in three years; triennial.
[R.]
J. Gregory.
Webster 1828 Edition
Trieterical
TRIETER'ICAL
,Adj.
Triennial; kept or occurring once in three years. [Little used.]