hartshorn
noun
harts·horn ˈhärts-ˌhȯrn 
: a preparation of ammonia used as smelling salts
Word History
Etymology
from the earlier use of hart's horns as the chief source of ammonia
First Known Use
1685, in the meaning defined above
Medical Definition
hartshorn
noun
harts·horn ˈhärts-ˌhȯ(ə)rn
: a preparation of ammonia used as smelling salts see spirit of hartshorn