pro·logue also pro·log 
(prōlôg′, -lŏg′)
(prōlôg′, -lŏg′)n.
1. An introduction or preface, especially a poem recited to introduce a play.
2. An introduction or introductory chapter, as to a novel.
3. An introductory act, event, or period.
[Middle English prolog, from Old French prologue, from Latin prologus, from Greek prologos : pro-, before; see PRO-2 + logos, speech; see leg- in the Appendix of Indo-European roots.]
- posh
- poshly
- poshness
- posigrade
- posit
- position
- positional
- positionally
- positional notation
- position effect
- positioner
- position paper
- position vector
- positive
- positive law
- positively
- positiveness
- positivism
- positivist
- positivistic
- positivity
- posit on
- posit on (or upon)
- positron
- positron emission tomography