rat·a·plan 
(rătə-plăn′)
(rătə-plăn′)n.
A tattoo, as of a drum, the hooves of a galloping horse, or machine-gun fire.
[French, of imitative origin.]
- conjoin
- conjoined twin
- conjoiner
- conjoint
- conjointly
- conjugal
- conjugality
- conjugally
- conjugal rights
- conjugal visit
- conjugant
- conjugate
- conjugate acid
- conjugate base
- conjugated
- conjugated protein
- conjugately
- conjugation
- conjugational
- conjugationally
- conjugation tube
- conjugative
- conjugator
- conjunct
- conjunction