adjective of or related to a test or trial.the fields of experimental and clinical medicine. See the full entry

adjective intended for defense or protection, or serving to defend or protect.Defensive fortifications were built along the sea coast.Defensive measures were taken to protect the island from invasion. See the full entry

noun any object made by human beings, especially one of an earlier era.The museum had an exhibit of ancient Mexican artifacts. See the full entry

With the Wordsmyth Vocabulary Center activities, you can study the words of the week, play games with them, and assess your knowledge of their meanings with a quiz. Go to the Vocabulary…

intransitive verb to feel about or feel one’s way with the hands, as if blind.She groped in the dark for the light switch. See the full entry