12-letter words containing x, r, a
- quadruplexes — Plural form of quadruplex.
- radiant flux — the time rate of flow of radiant energy.
- radical axis — the line such that tangents drawn from any point of the line to two given circles are equal in length.
- radio galaxy — a galaxy that emits much more strongly in the radio part of the spectrum than does a typical galaxy.
- reannexation — the act or process of reannexing something
- reflex angle — an angle greater than 180° and less than 360°.
- rubber latex — the milky sap of any of several trees of the genus Hevea, especially H. brasiliensis, from which natural rubber is derived.
- sandbox tree — a tropical American tree, Hura crepitans, of the spurge family, bearing a furrowed, roundish fruit about the size of an orange that when ripe and dry bursts with a sharp report and scatters the seeds.
- serotaxonomy — the study of the taxonomy of proteins using serological methods
- sexagenarian — of the age of 60 years or between 60 and 70 years old.
- sexcentenary — pertaining to 600 or a period of 600 years; marking the completion of 600 years.
- sexual spore — a spore formed after the fusion of gametes and an asexual spore is the result of asexual reproduction
- six-yard box — On a football pitch, the six-yard box is the rectangular area marked in front of the goal.
- six-year-old — being six years in age
- sixth-grader — a pupil in their sixth US school year after kindergarten, who is usually around 11 or 12 years old
- solar plexus — Also called celiac plexus. Anatomy. a network of nerves situated at the upper part of the abdomen, behind the stomach and in front of the aorta.
- submaxillary — of or relating to the lower jaw or lower jawbone.
- supermaxilla — the upper jaw.
- tax increase — an increase in the amount of tax that people and companies are obliged to pay
- tax preparer — accountant hired to calculate taxes
- tax-deferred — noting or providing income that is not taxed until a later time.
- tetrahydroxy — (of a molecule) containing four hydroxyl groups.
- texas ranger — a member of the Texas state police force or, especially formerly, of the mounted state police.
- the fair sex — women collectively
- toxocariasis — the infection of humans with the larvae of a genus of roundworms, Toxocara, of dogs and cats. It can cause swelling of the liver and, sometimes, damage to the eyes
- trans-sexual — a person having a strong desire to assume the physical characteristics and gender role of the opposite sex.
- transfer box — A transfer box is a gear system that divides the power between the front and rear axles of a four-wheel drive system.
- transfer tax — a transaction fee imposed on the transfer of title to property
- trophallaxis — (among social insects) the exchange of nutriments or other secretions between members of a colony.
- twin paradox — a phenomenon predicted by relativity. One of a pair of identical twins is supposed to live normally in an inertial system whilst the other is accelerated to a high speed in a spaceship, travels for a long time, and finally returns to rest beside his twin. The travelled twin will be found to be younger than his brother
- unexplorable — to traverse or range over (a region, area, etc.) for the purpose of discovery: to explore the island.
- unexpurgated — to amend by removing words, passages, etc., deemed offensive or objectionable: Most children read an expurgated version of Grimms' fairy tales.
- uranic oxide — uranium dioxide.
- x-ray binary — a binary star that is an intense source of X-rays and is composed of a normal star in close orbit with a white dwarf, neutron star, or black hole
- xanthochroia — a condition causing yellow patches on the skin similar to xanthoma
- xanthochroid — of, relating to, or designating races having light-coloured hair and a pale complexion
- xanthopterin — a yellow pigment, C6H5N5O2, found in some butterfly or moth wings or in the urine of mammals
- xenoreactive — (immunology) That generates a reaction to material from another species.