1Chemistry (originally) a mixture of phosphoric and phosphorous acids, formerly supposed to be a distinct acid; (now) any acid which gives rise to phosphates.
2Biochemistry= phosphatidic acid.
Origin
Early 19th century.
Definition of phosphatic acid in US English:
phosphatic acid
noun
1Chemistry (originally) a mixture of phosphoric and phosphorous acids, formerly supposed to be a distinct acid; (now) any acid which gives rise to phosphates.