The creatures from the Alien series with smooth, horizontally-placed-banana-shapped heads, an exoskeleton, extremely sharp teeth and a stab-wise tail. Commonly has no visible eyes.

A creature based off of H.R Gigers design and seen in movies such as Alien, Aliens, Alien 3, and the piece of shit movie Alien Ressurection. Has a long smooth head, exoskeleton, double jaw, and a long boney tail with a point for stabing or other uses like making marshmallows. If you see one and your not armed, you can only do one thing. Kis your ass good bye.

Phase one - Egg, A soft pod that contains Phase two of Xenomorph Development

Phase two - Facehugger, A Spiderlike creature with a tail that implants an Embryo into the throat of the being it latched onto*, It's tail wraps around, and constricts the throat, so as to cause the victim to lose conciousness. Then, To prevent host death, It gives the host small amounts of oxygen from two sacs behind the legs of the Facehugger. Once the embryo is implanted, it sinks down into the upper chest of the host, where it gestates. As soon as the Embryo loses touch with the implantation 'tongue' of the facehugger, the facehugger detatches and dies. Then the Embryo grows into Phase three.

Phase three - Chestburster, The Production of the embryo, it's name comes into play when it is fully grown. Where it digs/eats it's way through the hosts internal organs, bones, and chest, and 'bursts' out. Depending on the host, the Xenomorph may be of varied sizes immediately after birth. Human and Yautja Borne-Xenomorph chestbursters are relatively small, but Dog and cat, and soforth borne Xenomorphs grow until they no longer fit in the host's stomach, then they 'burst'. The Chestbursters gnerally take familiar traits from the host Humans 'give birth' to Xenomorphs with Humanly capabilities, such as Bipedalism. Once a Chestburster is born, It immediately looks to feed, once it has done so, It sheds it's chestburster skin and fully grows into Phase four.

Phase four - Fully-Grown Xenomorph, Hav...

Featured in Alien, Aliens, Alien 3, Alien Resurrection, Alien Versus Predator, and the upcoming Alien Versus Predator: Requiem, a Xenomorph is a particularily nasty creature.

First, a queen lays an egg, which opens and releases a Facehugger, that proceeds to latch on to someones face, and implant an embryo into their throat. The embryo grows until it no longer fits, and then eats and smashes through the chest of the victim, most likely, killing it. The newborn Chestburster must feed to grow into an Adult.

n. Space alien
xeno = foreign/alien, morph = entity/change - coined from "Aliens" by James Cameron

It is a Alien, with a exoskeleton like a comman bug. Used in the greatest series of all time, The Alien Legacy.

an alien with two mouths,big-ass head,acid for blood,and a sharp tail