EPIDEMICAL
Adjective
epidemical (comparative more epidemical, superlative most epidemical)
(obsolete) Alternative form of epidemic
Source: Wiktionary
Ep`i*dem"ic, Ep`i*dem"ic*al, a. Etym: [L. epidemus, Gr. épidémique.
Cf. Demagogue.]
1. (Med.)
Definition: Common to, or affecting at the same time, a large number in a
community; -- applied to a disease which, spreading widely, attacks
many persons at the same time; as, an epidemic disease; an epidemic
catarrh, fever, etc. See Endemic.
2. Spreading widely, or generally prevailing; affecting great
numbers, as an epidemic does; as, epidemic rage; an epidemic evil.
It was the epidemical sin of the nation. Bp. Burnet.
Source: Webster’s Unabridged Dictionary 1913 Edition