rotl
Alternative form of rottol: a former Middle Eastern and North African unit of weight, usually 1–5 pounds (0.5–2.5 kg).

rotls
plural of rotl

rotoli
plural of rotolo

rotolo
A kind of roll.
Alternative form of rottol: a former Middle Eastern and North African unit of dry weight, usually between 1–5 pounds (.5–2.5 kg).

rotolos
plural of rotolo

rotor
A rotating part of a mechanical device; for example, in an electric motor, generator, alternator, or pump.
A rotating part of a mechanical device; for example, in an electric motor, generator, alternator, or pump.
A rotating part of a mechanical device; for example, in an electric motor, generator, alternator, or pump.
A type of powerful horizontal-axis atmospheric vortex generated by the interaction of strong winds with mountainous terrain.
A quantity having magnitude, direction, and position.
The set of cells within an oscillator that switch between being alive and dead over the course of the oscillator's period.
An amusement park and carnival ride consisting of a rotating cylindrical chamber in which centrifugal force adheres riders to the wall as the floor drops away, creating a sensation of defying gravity.

rotors
plural of rotor

rottle
Alternative form of rottol.

rottles
plural of rottle

rottol
A former Middle Eastern and North African unit of dry weight, usually between 1–5 pounds (0.5–2.5 kg).

rottoli
plural of rottolo

rottolo
Alternative form of rottol: a former Middle Eastern and North African unit of dry weight, usually between 1–5 pounds (.5–2.5 kg).

rottolos
plural of rottolo

rottols
plural of rottol

rouf
The number four.
The number four.
The number four.
The number four.
The number four.

roufs
plural of rouf

roughness
The property of being rough, coarseness.
Something that is rough; a rough spot.
Roughage; coarse fodder.
Abundance, especially of food.
A measure of how rough something is, such as a surface

roughnesses
plural of roughness

roundness
The quality or degree of being round.
The quality or degree of being round.

roundnesses
plural of roundness

routon
A 128-dimensional hypercomplex number.

routons
plural of routon

rubidium
The chemical element (symbol Rb) with an atomic number of 37. It is a soft, highly reactive alkali metal.
A single atom of this element.

rubidiums
plural of rubidium

rubrosulphin
A toxic metabolite found in a number of fungi.

rudite
psephite

rudites
plural of rudite

runathon
A charity event in which participants run a long distance
A match in which a large number of runs are scored

runathons
plural of runathon

rundlet
A small cask of no certain dimensions, which may contain from 3 to 20 gallons.
Such a cask of a certain size; its volume used as a measure for liquids, especially wine, usually 18.5 gallons.

rundlets
plural of rundlet

runlet
A small brook or stream.

runlets
plural of runlet

runout
Something that has been run out.
The method of getting out (dismissed from play) in which a batsman, in making a run, has not reached the popping crease when a fielder breaks his wicket with the ball.
A relatively flat portion at the end of a ski run to slow down, or to connect trails.
Slowing down at the end of a ski run, skiing on a runout.
The end portion of the groove of a phonographic record, after the recorded sound.
A supposed auction employing shill bidders in order to convince legitimate buyers to purchase worthless articles.
Deviation of the axis of rotation of a rotating object (especially a milling cutter or workpiece) relative to that object's centerline; the specific amount of deviation.
A sudden tension between two coupled railcars when the fore one is moving faster than the hinder one.

runouts
plural of runout

runstand
The number of runs scored by two batters in a partnership

runstands
plural of runstand

runway
A defined, narrow section of land or an artificial structure used for access.
The usual path taken by deer or other wild animals, such as from a forest to a water source.
A narrow walkway (often on a platform) extending from a stage on which people walk, especially one used by models during fashion shows.
In javelin, long jump, and similar events: a short track along which athletes can accelerate themselves for their jumps or throws.
A section of land, usually paved, for airplanes to land on or take off from.
The number of months that a startup company can operate by using up its cash reserves.
A stream bed.

runways
plural of runway

rustyhood
Any of a number of orchids in the genus Pterostylis.

rustyhoods
plural of rustyhood

rutherford
An obsolete unit of radioactivity (symbol: rd), defined as the activity of a quantity of radioactive material in which one million nuclei decay per second.

rutherfordium
A transuranic chemical element (symbol Rf) with an atomic number of 104.
A rejected name for seaborgium.
A rejected name for lawrencium.

rutherfords
plural of rutherford

ruttee
Alternative form of ratti (“Indian unit of measure”).

ruttees
plural of ruttee

sabin
A unit of measurement that measures a material's absorbance of sound. A material that is 1 square meter in size that can absorb 100% of sound has a value of one metric sabin.

sabins
plural of sabin

saccharimeter
A polarimeter used to measure the sugar content of a liquid.

saccharimeters
plural of saccharimeter

saccharometer
A hydrometer used to measure the sugar content of a liquid.

saccharometers
plural of saccharometer

saccharopinuria
The presence of (elevated amounts of) saccharopine in the urine

sacci
plural of saccus

saccus
A bladder or winglike structure found on the pollen grains of many species of conifer. The shape or number of the sacci on a pollen grain can help identify the species it came from.
Alternative form of sac.

sachet
A small scented cloth bag filled with fragrant material such as herbs or potpourri.
A cheesecloth bag of herbs or spices added during cooking and then removed before serving.
A small, sealed packet containing a single-use quantity of any material.

sachets
plural of sachet

sackfuls
plural of sackful

sacksful
plural of sackful

saco
A traditional Spanish unit of dry measure, equivalent to about 111 L.

sacos
plural of saco

saddlecloth
A blanket placed under a saddle, a saddle blanket.
A cloth displaying a racehorse's number.

saddlecloths
plural of saddlecloth

sagan
Alternative letter-case form of Sagan.

sagans
plural of sagan

sagene
Alternative form of sazhen (“old Russian length”).

sagenes
plural of sagene

sajene
Alternative form of sazhen.

sajenes
plural of sajene

sajodin
Calcium iodobehenate.

salaeratus
Alternative form of saleratus.

saleratus
Sodium bicarbonate.
Potassium bicarbonate.

saleratuses
plural of saleratus

salimeter
A hydrometer used to measure the concentration of salt in a solution.

salimeters
plural of salimeter

salimetrics
The measurement of saliva

salometer
Alternative form of salimeter.

salometers
plural of salometer

samplesize
The size (number of units) of a sample

samplesizes
plural of samplesize

samplings
plural of sampling

sanitation
The hygienic disposal or recycling of waste.
The policy and practice of protecting health through hygienic measures.

sanitations
plural of sanitation

saprobicity
Synonym of saprobity.

saprobities
plural of saprobity

saprobity
A measure of the amount of decaying organic material in an environment such as a river.

sarcelle
Any of a number of teals (ducks)

sarcelles
plural of sarcelle

sarcosin
Alternative form of sarcosine.

sarcosine
The amino acid N-methyl-glycine; it is present in most tissue, and has a number of industrial applications

saroi
plural of saros

saros
A quantity of 3600, such as a period of 3600 years.
A period of 223 synodic months (approximately 18 years 11 days 8 hours), after which the relative positions of the earth, sun and moon recur, used to predict eclipses.

saroses
plural of saros

sarrasins
plural of sarrasin

sarsahi
A unit of area used in the Indian subcontinent, of varying size.