X-Chromosome
eks KROH-muh-sohm
/ɛks ˈkroʊməˌsoʊm/
One of the two sex-determining chromosomes; females have two, while males have one X and one Y.
Xiphoid Process
ZY-foyd PROS-es
/ˈzaɪfɔɪd ˈprɒsɛs/
The small cartilaginous extension of the lower part of the sternum, which usually ossifies in adulthood.