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
electro-acoustic transducer for converting electric signals into sounds; it is held over or inserted into the ear; "it was not the typing but the earphones that she disliked"
exert a force on (a body) causing it to approach or prevent it from moving away; "the gravitational pull of a planet attracts other bodies"
direct toward itself or oneself by means of some psychological power or physical attributes; "Her good looks attract the stares of many men"; "The ad pulled in many potential customers"; "This pianist pulls huge crowds"; "The store owner was happy that the ad drew in many new customers"
be attractive to; "The idea of a vacation appeals to me"; "The beautiful garden attracted many people"
the time required for something to fall to half its initial value (in particular, the time for half the atoms in a radioactive substance to disintegrate)
a compound made artificially by chemical reactions
of a proposition whose truth value is determined by observation or facts; "`all men are arrogant' is a synthetic proposition"
systematic combining of root and modifying elements into single words
involving or of the nature of synthesis (combining separate elements to form a coherent whole) as opposed to analysis; "limnology is essentially a synthetic science composed of elements...that extend well beyond the limits of biology"- P.S.Welch
not genuine or natural; "counterfeit rhetoric that flourishes when passions are synthetic"- George Will
excessively and uncomfortably conscious of your appearance or behavior; "self-conscious teenagers"; "wondered if she could ever be untidy without feeling self-conscious about it"
aware of yourself as an individual or of your own being and actions and thoughts; "self-conscious awareness"; "self-conscious about their roles as guardians of the social values"- D.M.Potter
someone who expresses in language; someone who talks (especially someone who delivers a public speech or someone especially garrulous); "the speaker at commencement"; "an utterer of useful maxims"
the presiding officer of a deliberative assembly; "the leader of the majority party is the Speaker of the House of Representatives"