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Webster's 1828 Dictionary

PRUSSIC

a.The prussic acid is a compound of kyanogen or cyanogen, prussic gas and hydrogen, and hence called hydrocyanic acid. It is one of the strongest poisons known.

 

Webster's 1913 Dictionary

PRUSSIC

Prus "sic, a. Etym: [Cf. F. prussique.] (Old Chem. )

 

Defn: designating the acid now called hydrocyanic acid, but formerly called prussic acid, because Prussian blue is derived from it or its compounds. See Hydrocyanic.

 

New American Oxford Dictionary

prussic acid

prus sic ac id |ˈprəsik ˌprəsɪk ˈæsəd | ▶noun old-fashioned term for hydrocyanic acid. DERIVATIVES prus si ate |ˈprəsēˌāt |noun ORIGIN late 18th cent.: prussic from French prussique ‘relating to Prussian blue. ’

 

Oxford Dictionary

prussic acid

prussic acid |ˈprʌsɪk | ▶noun old-fashioned term for hydrocyanic acid. DERIVATIVES prussiate noun ORIGIN late 18th cent.: prussic from French prussique ‘relating to Prussian blue ’.

 

Sanseido Wisdom Dictionary

prussic acid

pr ù ssic á cid /prʌ̀sɪk -/名詞 U 〘化 〙青酸 .