monohydrogenadj.
/ˌmɒnə(ʊ)ˈhʌɪdrədʒ(ə)n/, U.S. /ˌmɑnəˈhaɪdrədʒ(ə)n/ Chemistry.
attributive. Designating compounds containing one hydrogen atom or ion for each combining radical or ion.
ΚΠ
1871 H. E. Roscoe Lessons Elem. Chem. (new ed.) xv. 155 (heading) Metaphosphoric acid, or monohydrogen phosphate.
1938 R. Hum Chem. for Engin. Students xxiv. 667 Pyrophosphates are most readily prepared by heating the monohydrogen orthophosphates.
1996 Appl. Organometallic Chem. 10 421 Linear and branched monohydrogen di-, tri-, tetra- and penta-siloxanes and polyhydrogen siloxanes..have been found to be good starting materials for the synthesis of amides.
This entry has been updated (OED Third Edition, December 2002; most recently modified version published online March 2022).
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adj.1871- close distance
- close down
- close fight
- close harmony
- close in
- close mourner
- close mourning
- close off
- close on a wind
- close one's days
- close one's doors
- close one's ears
- close one's ears occasionally ear
- close one's eyes to
- close one's face
- close one's mind
- close one's mouth
- close order
- close out
- close packing
- close pile
- close port
- close quarters
- close quote
- close rank