noun
exonuclease
Technical term in molecular biology; an enzyme that cleaves nucleotides from the ends of a nucleic acid chain.
エキソヌクレアーゼはDNAの末端からヌクレオチドを一つずつ切り出す。
Exonucleases cleave nucleotides one by one from the ends of DNA.
Borrowed from English 'exonuclease', itself from 'exo-' (outside) + 'nuclease'.