prefix, noun which may take the genitive case particle 'no'
inverse; reverse; retro-; contra-
Technical prefix or adjectival noun used in scientific and medical compounds to indicate an opposite or reversed property, such as 逆性石鹸 (invert soap) or 逆性転写酵素 (reverse transcriptase). Not a free-standing word.
逆性石鹸は殺菌作用がある。
Invert soap has a bactericidal effect.
逆性転写酵素はウイルスの増殖に関わる。
Reverse transcriptase is involved in viral replication.