Category: X

Symmetrical twins joined at the xiphoid process.  

Surgical separation of twins joined at the xiphoid process.  

Inflammation of the xiphoid process. Discomfort in the xiphoid cartilage located at the lower end of the sternum.  

The silencing of the genes on one of a woman’s paired X chromosomes, allowing the other chromosome’s genes to be expressed phenotypically. The process is not universal but affects 75% or more of the genes on the chromosome. Genes that are found near the short end of the chromosome are more likely than the rest…

A growth factor, identified as hemin, that is needed to grow the bacterium, Haemophilus influenzae in culture.  

Dry labor caused by a diminished amount of amniotic fluid.  

An erythrocyte that is dehydrated and appears to have “puddled” at one end, seeming half dark and half light. This type of cell is found in hereditary xerocytosis.  

A disease of the hair in which there is abnormal dryness and brittleness, and eventually hair loss.  

Of some viruses, capable of growing in a species that differs from their normal host.  

The rat flea; other hosts include humans. This species is a vector for a number of pathogens including Hymenolepis nana, the dwarf tapeworm; Salmonella organisms; the causative organisms of bubonic and sylvatic plague and endemic typhus.