As an adjective preop is
happening before an operation.
As a noun preop is
someone who has not yet been operated on.
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Not English
Wikidiffcom has no English definition. It may be misspelled. preop
English
Alternative forms
*pre-op
Adjective
(-)
happening before an operation
:A preop consultation
not yet having being operated on
:A preop transsexual
Synonyms
*preoperational
Antonyms
*postop/post-op
Noun
(
en noun)
someone who has not yet been operated on.