Correct spelling for the English word "chapasgar" is [t͡ʃˈapasɡə], [tʃˈapasɡə], [tʃ_ˈa_p_a_s_ɡ_ə] (IPA phonetic alphabet).
A culture medium consisting of 1 part ascitic fluid and 2 parts of 3 per cent. agar with Chapoteau's peptone.
A practical medical dictionary. By Stedman, Thomas Lathrop. Published 1920.