put to the test, as for its quality, or give experimental use to
conduit consisting of a long hollow object (usually cylindrical) used to hold and conduct objects or liquids or gases
trying something to find out about it
a very young child (birth to 1 year) who has not yet begun to walk or talk
any standardized procedure for measuring sensitivity or memory or intelligence or aptitude or personality etc
electronic device consisting of a system of electrodes arranged in an evacuated glass or metal envelope
the act of testing something
