In all living organisms, Coenzyme A is synthesized in a five-step process that requires four molecules of ATP, from pantothenate and cysteine: 1  Pantothenate (vitamin B5) is phosphorylated to 4'-phosphopantothenate by the enzyme pantothenate kinase (PanK; CoaA; CoaX)
Origin: From TARDIS, the time machine in British science-fiction TV programme Doctor Who. Freebase(0.00 / 0 votes)Rate this definition: The TARDIS is a time machine and spacecraft in the British science fiction television programme Doctor Who and its associated spin-offs. A TARDIS is a product of the advanced technology of the Time Lords, an extraterrestrial civilisation to which the programme's central character, the Doctor, belongs.
Definition of tarnish. 1  transitive verb. 2  1 : to dull or destroy the luster of by or as if by air, dust, or dirt : soil, stain. 3  2a : to detract from the good quality of : vitiate his fine dreams now slightly tarnishedb : to bring disgrace on : sully the scandal has tarnished his reputation. 4  intransitive verb. : 5  to become tarnished.