13-letter words containing e, x, s, r
- ring exercise — any sequence of gymnastic movements carried out by a gymnast holding two rings suspended from the ceiling
- rotation-axes — a process of replacing the axes in a Cartesian coordinate system with a new set of axes making a specified angle with and having the same origin as the original axes.
- roxburghshire — a historic county in SE Scotland.
- sacral plexus — a nerve network originating from the nerves of the sacral spine and innervating large areas of the lower trunk and legs, especially via the sciatic nerves.
- saddle oxford — saddle shoe.
- saint-exupery — Antoine de [ahn-twan duh] /ɑ̃ˈtwan də/ (Show IPA), 1900–45, French author and aviator.
- self-exposure — the act of exposing, laying open, or uncovering: the sudden exposure of objects that were hidden under the blanket.
- severance tax — a tax levied by a state on the extraction and use of a natural product, as coal, that is sold outside the state or during a certain period.
- sex chromatin — Barr body.
- six-yard line — the line marking the limits of the goal area
- soapbox derby — a race between children in homemade racing carts
- spermatotoxic — spermotoxic.
- spermatotoxin — spermotoxin.
- square matrix — a matrix in which the number of rows is equal to the number of columns.
- start of text — (character) (STX) Mnemonic for ASCII 2.
- tax inspector — a government official whose job is to make sure that people and companies are paying the right amount of tax
- texas leaguer — a pop fly that falls safely between converging infielders and outfielders.
- texas rangers — a member of the Texas state police force or, especially formerly, of the mounted state police.
- time exposure — a long exposure in which the shutter is opened and closed by hand or by a mechanism other than the automatic mechanism of the shutter.
- underexposure — inadequate exposure, as of photographic film.
- visual cortex — the portion of the cerebral cortex of the brain that receives and processes impulses from the optic nerves.
- vortex street — a regular stream of vortices or parallel streams of vortices carried downstream by the flow of a fluid over a body. These are sometimes made visible by vapour condensation as in the vortex trails from the wing tips of an aeroplane
- x-ray burster — a celestial source from which bursts of x-rays are received.
- xenoestrogens — Plural form of xenoestrogen.
- yeast extract — food ingredient obtained from yeast
- zf expression — (programming) (After Zermelo Fränkel set theory). David Turner's name for list comprehension.
- zoopraxiscope — an early type of motion-picture projector, designed by Eadweard Muybridge, in which the images were drawings or photographs placed along the rim of a circular glass plate, the shutter was a rotating opaque disk with radial slots, and a limelight source was used.