monacid /mon-asˈid/ or monoacid /mo-nō-asˈid/

1. Having one replaceable hydrogen atom
2. Capable of replacing one hydrogen atom of an acid

• unpack
• unpacked
• unpacker
• unpackers
• unpacking
• utu
• U-tube
• U-tubes
• U-turn
• U-turns
• utus
• UU
• uv
• UV
• uva
• UV-A
• UVA
• uvae
• uvarovite
• uvarovites
• uvas
• uva-ursi
• UV-B
• UVB
• UVC