ret·ro·rock·et 
(rĕtrō-rŏk′ĭt)
(rĕtrō-rŏk′ĭt)n.
A rocket engine used to retard, arrest, or reverse the motion of a vehicle, such as an aircraft, missile, or spacecraft.
- in-depth
- Inderal
- indescribability
- indescribable
- indescribableness
- indescribably
- indestructibility
- indestructible
- indestructibleness
- indestructibly
- in detail
- indeterminable
- indeterminably
- indeterminacy
- indeterminate
- indeterminately
- indeterminateness
- indetermination
- indeterminism
- indeterminist
- indeterministic
- index
- indexation
- index case
- indexer