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
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
the metabolic processes whereby certain organisms obtain energy from organic molecules; processes that take place in the cells and tissues during which energy is released and carbon dioxide is produced and absorbed by the blood to be transported to the lungs
a single complete act of breathing in and out; "thirty respirations per minute"
respirator that produces alternations in air pressure in a chamber surrounding a patient's chest to force air into and out of the lungs thus providing artificial respiration