noun-modifying (irregular)
monobasic; monatomic; single-nucleotide
Chemistry term used prenominally to describe an acid with one replaceable hydrogen atom, a monatomic molecule, or a single-nucleotide unit.
A monobasic acid releases one proton in aqueous solution.
A single-nucleotide variant is when one nucleotide in a gene is replaced.
Compound of 一 (one) and 塩基 (base), a calque from Western chemistry terminology.