tail·coat 
(tālkōt′)
(tālkōt′)n.
A black coat worn for formal occasions and having a long rounded and split tail. Also called swallowtail, swallow-tailed coat.
- infraction
- infractor
- infra dig
- infrahuman
- infrangibility
- infrangible
- infrangibly
- infraorder
- infrared
- infrared astronomy
- infrasonic
- infrasound
- infraspecific
- infrastructural
- infrastructure
- infrequence
- infrequency
- infrequent
- infrequently
- infringe
- infringement
- infringer
- infructescence
- in full cry
- in full swing