Heartburn

[hahrt-burn] /ˈhɑrtˌbɜrn/

noun
1.
an uneasy burning sensation in the stomach, typically extending toward the esophagus, and sometimes associated with the eructation of an acid fluid.
2.
bitter jealousy; envy.
/ˈhɑːtˌbɜːn/
noun
1.
a burning sensation beneath the breastbone caused by irritation of the oesophagus, as from regurgitation of the contents of the stomach Technical names cardialgia, pyrosis
noun

See acid reflux
n.

mid-13c., herte-brine “lust,” later “heartburn, indigestion” (mid-15c.); also herte-brenning “anger, bitterness” (c.1400), also “heartburn” (mid-15c.). See heart + burn (n.). Also cf. cardiac.

heartburn heart·burn (härt’bûrn’)
n.
A burning sensation, usually centered in the middle of the chest near the sternum, caused by the reflux of acidic stomach fluids that enter the lower end of the esophagus. Also called cardialgia, pyrosis.
heartburn
(härt’bûrn’)
A burning sensation, usually centered in the middle of the chest near the sternum, caused by the reflux of acidic stomach fluids that enter the lower end of the esophagus. Also called acid reflux.

A burning sensation in the middle of the chest at the junction of the esophagus and stomach, caused by stomach acids that back up and enter the lower end of the esophagus.