Definition that contains only when
- reserve an athlete who plays only when a starter on the team is replaced
- substitute an athlete who plays only when a starter on the team is replaced
- cashew kidney-shaped nut edible only when roasted
- cashew tropical American evergreen tree bearing kidney-shaped nuts that are edible only when roasted
- amiodarone an antiarrhythmic drug (trade name Cordarone) that has potentially fatal side effects and is used to control serious heart rhythm problems only when safer agents have been ineffective
- billabong a branch of a river made by water flowing from the main stream only when the water level is high
- recessive (of genes) producing its characteristic phenotype only when its allele is identical
- recessive an allele that produces its characteristic phenotype only when its paired allele is identical
- first strike the initial use of nuclear weapons to attack a country that also has nuclear weapons; considered feasible only when the attacker can destroy the other country's ability to retaliate
- second law of thermodynamics a law stating that mechanical work can be derived from a body only when that body interacts with another at a lower temperature; any spontaneous process results in an increase of entropy