Prognósticon, ci neut. gen. cor. Cic.A prognostication: a token or signe of a thing to come.Si prognostica nostra vera sunt.Cic.
Lewis and Short: Latin dictionary
prŏgnōstĭcon or -um, i, n., = prognwstiko/n, a sign or token of the future, a prognostic; hence, prŏgnōstĭca, ōrum, n., the signs of the weather, Quint. 5, 9, 15.— Also as the title of Cicero's translation of the *prognwstika/ of Aratus, Cic. Div. 1, 8, 13; v. the fragments, id. Op. v. XI. p. 96 sqq. B. and K.