phosphono

https://doi.org/10.1351/goldbook.P04564
A prefix indicating the presence of the group –P(=O)(OH)2 .
See: phospho
Source:
PAC, 1995, 67, 1307. 'Glossary of class names of organic compounds and reactivity intermediates based on structure (IUPAC Recommendations 1995)' on page 1358 (https://doi.org/10.1351/pac199567081307)