период
- absolute refractory period
- aestivation period
- blooming period
- bud-formation period
- Cambrian period
- Cretaceous period
- critical period
- crucial period
- dark period
- dormant period
- eclipse period
- flowering period
- fruit-setting period
- growth period
- half-life period
- heat period
- incubation period
- intracellular growth period
- Jurassic period
- lactation period
- lag period
- latent period
- laying period
- light period
- mating period
- patent period
- period of feeding
- phage latent period
- preoviposition feeding period
- prepatent period
- puerperal period
- quiescent period
- reaction period
- refractory period
- regulation period
- relative refractory period
- reproduction period
- reproductive period
- rest period
- rise period
- sensitive period
- service period
- sexually active period
- stagnating period
- Tertiary period
- tillering period
- vegetation period
- warning period
- wilting period