re·ten·tive 
/rɪˈtɛntɪv/ adjective
/rɪˈtɛntɪv/ adjective [more retentive; most retentive] formal : having the ability to remember things easily or for a long time
▪ a retentive mind/memory — see also anal-retentive
▪ a retentive mind/memory — see also anal-retentive
— re·ten·tive·ness noun [noncount]
