achlorhydria
noun
achlor·hy·dria ˌā-ˌklȯr-ˈhī-drē-ə 
: absence of hydrochloric acid from the gastric juice
achlorhydric
ˌā-ˌklȯr-ˈhī-drik
adjective 
Word History
Etymology
probably borrowed from French achlorhydrie, from a- a- entry 2 + (acide) chlorhydr(ique) "hydrochloric acid" (from chlore "chlorine"—borrowed from Greek chlōrós "greenish-yellow"— + hydr- hydr- + -ique -ic entry 1) + -ie -ia entry 1 — more at yellow entry 1
First Known Use
1892, in the meaning defined above
Medical Definition
achlorhydria
noun
achlor·hy·dria ˌā-ˌklōr-ˈhī-drē-ə, -ˌklȯr-
: absence of hydrochloric acid from the gastric juice compare hyperchlorhydria, hypochlorhydria