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biphenyl
bipinnate
biplane
bipod
bipolar
bipolar disorder
bipotentiality
biprism
bipropellant
BIPS
biquadratic
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bipropellant

bi·pro·pel·lant [ bprə péllənt ] (plural bi·pro·pel·lants)


noun 
Definition:
 
rocket fuel: a substance made up of two elements, usually a fuel and an oxidizer, that is used to propel a rocket

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