orthoboric acid

[awr-thuh-bawr-ik, -bohr-, awr-thuh-] /ˈɔr θəˈbɔr ɪk, -ˈboʊr-, ˌɔr θə-/
noun, Chemistry
1.
boric acid (def 1).
Compare ortho- (def 2).
Origin
British Dictionary definitions for orthoboric acid

orthoboric acid

/ˌɔːθəʊˈbɔːrɪk/
noun
1.
the more formal name for boric acid (sense 1)