13-letter words containing a, m, x
- reflex camera — a camera in which the image appears on a ground-glass viewer (focusing screen) after being reflected by a mirror or after passing through a prism or semitransparent glass; in one type (single-lens reflex camera) light passes through the same lens to both the ground glass and the film, while in another type (twin-lens reflex camera) light passes through one lens (viewing lens) to the ground glass and through a second lens (taking lens) to the film, the lenses being mechanically coupled for focusing.
- sex chromatin — Barr body.
- sexagesimally — into sixtieths
- spermatotoxic — spermotoxic.
- spermatotoxin — spermotoxin.
- square matrix — a matrix in which the number of rows is equal to the number of columns.
- storax family — the plant family Styracaceae, characterized by trees and shrubs having simple, alternate leaves, clusters of bell-shaped white flowers, and fleshy or dry fruit, and including the silver bell, snowbell, and storax.
- tax exemption — immunity from paying tax
- taxonomically — the science or technique of classification.
- toxoplasmosis — infection with the parasite Toxoplasma gondii, transmitted to humans by consumption of insufficiently cooked meat containing the parasite or by contact with contaminated cats or their feces: the illness produced is usually mild, but in pregnant women may damage the fetus.
- unix man page — Unix manual page
- uranium oxide — any of the compounds of uranium and oxygen, as UO 2 , UO 3 , U 4 O 9 , or U 3 O 8 .
- vivax malaria — the most common form of malaria, caused by the protozoan Plasmodium vivax and marked by the occurrence of attacks every other day.
- xanthochroism — a condition in certain animals, esp aquarium goldfish, in which all skin pigments other than yellow and orange disappear
- xerophthalmia — abnormal dryness of the eyeball characterized by conjunctivitis, caused by a deficiency of tears and attributed to a lack of vitamin A.
- xerophthalmic — Of or pertaining to xerophthalmia.