n a proposal intended to explain certain facts or observations
n a tentative insight into the natural world; a concept that is not yet verified but that if true would explain certain facts or phenomena
a scientific hypothesis that survives experimental testing becomes a scientific theory
n a message expressing an opinion based on incomplete evidence
n a low level of prothrombin (factor II) in the circulating blood; results in long clotting time and poor clot formation and sometimes excessive bleeding; can result from vitamin K deficiency
n small plants that resemble amaryllis and that grow from a corm and bear flowers on a leafless stalk; sometimes classified as member of the family Amaryllidaceae: star grass