the repetition of an experiment in order to test the validity of its conclusion; "scientists will not believe an experimental result until they have seen at least one replication"
(law) a pleading made by a plaintiff in reply to the defendant's plea or answer
(genetics) the process whereby DNA makes a copy of itself before cell division
the state of needing something that is absent or unavailable; "there is a serious lack of insight into the problem"; "water is the critical deficiency in desert regions"; "for want of a nail the shoe was lost"