English
transfactor
From trans- + factor.
Proto-Indo-European *terh₂- ‘to cross over, pass through, overcome’
…
Proto-Indo-European *tr̥h₂ónts
Proto-Indo-European *tr̥h₂n̥ts
Proto-Italic *trāns ‘across, beyond’
Proto-Italic *trāns-
English trans-
Proto-Indo-European *dʰeh₁k-
…
Latin faciō ‘to do, make’
Latin factor ‘doer, maker’
Anglo-Norman factour
Middle English factour
English factor
Today it means
noun A material, taken from an animal that has acquired immunity, intended to be given to a patient
Language periods are conventional ranges, not dates for this word.
Etymograph / transfactor