coagulase. a bacterial enzyme that reacts with a cofactor found in blood plasma to catalyze the formation of fibrin from fibrinogen. It is produced by most of the virulent strains of staphylococci, and by Yersinia pestis.oagulase. a bacterial enzyme that reacts with a cofactor found in blood plasma to catalyze the formation of fibrin from fibrinogen. It is produced by most of the virulent strains of staphylococci, and by Yersinia pestis.
Definition of 'envoy'. Word Frequency. envoy (envÉÉª ) Word forms: plural envoys. 1. countable noun. An envoy is someone who is sent as a representative from one government or political group to another. 2. countable noun. An envoy is a diplomat in an embassy who is immediately below the ambassador in rank.
Definition of delegation for English Language Learners. : 1  a group of people who are chosen to vote or act for someone else. : 2  the act of giving control, authority, a job, a duty, etc., to another person.