ortho acids

Hypothetical compounds having the structure RC(OH)3. Thus hydrated forms of carboxylic acids. Orthocarbonic acid, C(OH)4 , is generically included.
See also: ortho amides, ortho esters
Source:
PAC, 1995, 67, 1307 (Glossary of class names of organic compounds and reactivity intermediates based on structure (IUPAC Recommendations 1995)) on page 1354