a rocket-propelled guided missile that can escape the earth's atmosphere; makes observations of the solar system that cannot be made by terrestrial observation
a device for showing the operating condition of some system
a signal for attracting attention
(chemistry) a substance that changes color to indicate the presence of some ion or substance; can be used to indicate the completion of a chemical reaction or (in medicine) to test for a particular reaction
expressive of contempt; "curled his lip in a supercilious smile"; "spoke in a sneering jeering manner"; "makes many a sharp comparison but never a mean or snide one"
conduct an inquiry or investigation of; "The district attorney's office investigated reports of possible irregularities"; "inquire into the disappearance of the rich old lady"
investigate scientifically; "Let's investigate the syntax of Chinese"