Encyclopedia : X : XY : XYS (8 articles)

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Xyster
A xyster (/ˈzɪs.tɚ/) is a surgical instrument for scraping bones and other firm tissues. ..
Xysticus
Xysticus is a genus of crab-spiders. Xysticus and Coriarachne are the dark brown or reddish-brown crab spiders often encountered on weeds or trees. While similar to the flower spiders, they tend to have shorter, sturdier legs and more patterned abdomens. They move slowly, and tend to hunt by stati..
Xystus
Xystus was the Greek architectural term for the covered portico of the gymnasium, in which the exercises took place during the winter or in rainy weather. The Romans applied the term to the garden walk in front of the porticoes, which was divided into flower beds with borders of box, and to a promen..
XY sex-determination system
The XY sex-determination system is a well-known sex-determination system. It is found in human beings and most other mammals, as well as some insects (Drosophila) and even some plants (Ginkgo). In the XY sex-determination system, females have two of the same kind of sex chromosome (XX), and are cal..

 

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