English
extrathecal
From extra- + thecal.
Proto-Indo-European *h₁éǵʰs ‘out’
Proto-Indo-European *h₁eǵʰsteros
Proto-Italic *eksteros
Latin exter ‘being on the outside’
Latin extrā ‘outside, except, beyond’
English extra-
Today it means
adj Located outside of the theca (any sense).
Language periods are conventional ranges, not dates for this word.
Etymograph / extrathecal