sub·ge·nus 
(sŭbjē′nəs)
(sŭbjē′nəs)n. pl. sub·gen·e·ra (-jĕn′ər-ə)
A taxonomic category of related organisms ranking below a genus and above a species.
- irradiate
- irradiation
- irradiative
- irradiator
- irradicable
- irradicably
- irrational
- irrationalism
- irrationality
- irrationally
- irrationalness
- irrational number
- Irrawaddy
- irreal
- irreality
- irreclaimability
- irreclaimable
- irreclaimableness
- irreclaimably
- irreconcilability
- irreconcilable
- irreconcilably
- irrecoverable
- irrecoverably
- irrecusable