| diesel engine | A compression-ignition piston engine in which fuel is ignited by injecting it into air that has been heated (unlike a spark-ignition engine). (05 Dec 1998) |
|---|---|
| diesterase | Enzymes (EC sub-subclass 3.1.4) cleaving phosphodiester bonds, such as those in cAMP or between nucleotides in nucleic acids, liberating smaller poly-or oligonucleotide units or mononucleotides but not inorganic phosphate. Synonym: phosphodiester hydrolases. (05 Mar 2000) |
| diestrous | Pertaining to diestrus. (05 Mar 2000) |
| diestrus | <zoology> Period of sexual quiescence separating phases of the estrous cycle in polyestrous animals. (12 Dec 1998) |