HYDROCYANIC
Etymology
Adjective
hydrocyanic (not comparable)
Of or pertaining to hydrocyanic acid or its compounds
Source: Wiktionary
Hy`dro*cy*an"ic, a. Etym: [Hydro-, 2 + anic: cf. F. hydrocyanique.]
(Chem.)
Definition: Pertaining to, or derived from the combination of, hydrogen and
cyanogen. Hydrocyanic acid (Chem.), a colorless, mobile, volatile
liquid, HCN, having a characteristic peach-blossom odor. It is one of
the most deadly poisons. It is made by the action of sulphuric acid
on yellow prussiate of potassium (potassium ferrocyanide), and
chemically resembles hydrochloric and hydrobromic acids. Called also
prussic acid, hydrogen cyanide, etc.
Source: Webster’s Unabridged Dictionary 1913 Edition