xeno-, xen-, -xenic, -xenism, -xenist, -xenous, -xeny

(Greek: foreign, foreigner; alien; different; extraneous; strange, stranger; and by extension, guest)

The "x" in xeno- is pronounced "z"; "zeno". Greeks are said to have considered any stranger a "guest" and modern Greek includes xenodocheion a "guest house" or "house for guests" or its modern version of "hotel".

The etymological meaning usually denotes some aspect of a relationship involving guests or visitors of some kind.

polyxeny
1. A parasite associated with many hosts during its life-cycle.
2. A parasite that is not host specific; also, pleioxeny.
proxeny
The office or function of a proxenus; the system of proxeni or hospitality between cities in ancient Greece. A proxenus was a resident citizen of a Greek state who was appointed by another state to represent and protect its interests.
pyrotechnic signal
A signal designed for military use to produce a colored light or smoke, for the purpose of transmitting information.
rheoxene
rheoxenous
rheoxenous, rheoxene
Used of organisms that occur only occasionally in running water.
stenoxenous
1. Tolerating only a narrow range of host species.
2. Restricted to a narrow range of hosts: said of parasites that are limited to one or a few host species.
stygoxenous, stygoxene
In biology, organisms found only occasionally in caves or subterranean passages.
synxeny, synxenic
A mixture of two or more organisms cultivated under controlled conditions.
toxenzyme
trixenous, trixeny
1. A reference to a parasite utilizing three host species during its life cycle.
2. A mixed culture of organisms, where one organism is associasted with three other species.
trogloxene (s) (noun), trogloxemes (pl)
1. A being found only occasionally in underground passages: Sam, the park naturalist, was charting the number of different trogloxenes who live from time to time in the caves, including hikers who get lost and sleep in them overnight.
2. A cavern guest; an animal that spends occasionally short periods in dark recesses: Hibernating bears are a common form of trogloxene, spending part of the winter season in large holes, or dens, in mountains or underground.
xenacanth (s) (noun), xenacanths (pl)
An extinct fish of the genus Xenacanthus: Greg was so happy when he found some information regarding the xenacanth, which was cartilaginous and not living anymore.
xenacanthine (adjective) (not comparable)
Relating to the division of Xenancanthini: Xenacanthine fishes or fossils are those that have long been extinct.
xenagogue, xenogogic
From Greek, to lead, leading; bring, take; plus a “guest” or stranger. A reference to someone who conducts strangers or foreigners; a tour guide.

Related "foreign, strange" word families: allotrio-; barbar-.