a·xen·ic 
(ā-zĕnĭk, ā-zēnĭk)
(ā-zĕnĭk, ā-zēnĭk)adj.
Not contaminated by or associated with any other living organisms. Usually used in reference to pure cultures of microorganisms that are completely free of the presence of other organisms.
[A-1 + Greek xenikos, foreign (from xenos, stranger; see ghos-ti- in the Appendix of Indo-European roots).]
a·xeni·cal·ly adv.
- extramundane
- extramural
- extraneous
- extraneously
- extraneousness
- extranet
- extranuclear
- extraocular muscle
- extraordinaire
- extraordinarily
- extraordinary
- extrapolate
- extrapolation
- extrapolative
- extrapolator
- extrapyramidal
- extrasensory
- extrasensory perception
- extrasolar
- extrasystole
- extrasystolic
- extraterrestrial
- extraterritorial
- extraterritoriality
- extraterritorially