||Look up -ase in Wiktionary, the free dictionary.
The suffix -ase is used in biochemistry to form names of enzymes. The most common way to name enzymes is to add this suffix onto the end of the substrate, e.g. an enzyme that breaks down peroxides may be called peroxidase; the enzyme that produces telomeres is called telomerase. Sometimes enzymes are named for the function they perform, rather than substrate, e.g. the enzyme that polymerizes (assembles) DNA into strands is called polymerase; see also reverse transcriptase.
This suffix was comes from the greek word ἄσις Greek διαστασις, which means slime or mud, due to the way that an enzymes attaches itself to the substance it is helping break down.