Term: half life: 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)
Broader: time period: an amount of time | Unrelated: european central bank: the central bank of those members of the European Union who share a common currency
Broader: time period: an amount of time | Unrelated: flat-coated retriever: an English breed having a shiny black or liver-colored coat; retrieves game from land or water
Broader: time period: an amount of time | Unrelated: flower arrangement: a decorative arrangement of flowers
Broader: time period: an amount of time | Unrelated: tortricidae: leaf rollers and codling moths
Broader: time period: an amount of time | Unrelated: vulcanizer: someone who vulcanizes rubber to improve its strength and resiliency
Broader: time period: an amount of time | Unrelated: manipulation: exerting shrewd or devious influence especially for one's own advantage
Broader: time period: an amount of time | Unrelated: dining-hall: a large room at a college or university; used especially for dining
Broader: time period: an amount of time | Unrelated: bowel movement: a euphemism for defecation
Broader: time period: an amount of time | Unrelated: punched card: a card on which data can be recorded in the form of punched holes
Broader: time period: an amount of time | Unrelated: negative reinforcing stimulus: a reinforcing stimulus whose removal serves to decrease the likelihood of the response that produced it