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.
a poem of six six-line stanzas and a three-line envoy, originally without rhyme, in which each stanza repeats the end words of the lines of the first stanza, but in different order, the envoy using the six words again, three in the middle of the lines and three at the end. 1  Also called sextain.