in·fra·class 
(ĭnfrə-klăs′)
(ĭnfrə-klăs′)n.
A taxonomic category of related organisms ranking below a subclass and above an order or superorder.
- cryptesthesia
- cryptic
- cryptical
- cryptically
- crypticness
- crypto
- crypto-
- thermoelectrically
- thermoelectricity
- thermoelectron
- thermogenesis
- thermogenetic
- thermogenic
- thermogram
- thermograph
- thermographic
- thermographically
- thermography
- thermohaline
- thermojunction
- thermokarst
- thermolabile
- thermolability
- thermoluminescence
- thermoluminescent