|
|
sulphur dioxide |
Noun
|
a colorless toxic gas (SO2) that occurs in the gases from volcanoes |
|
|
sulfur hexafluoride |
Noun
|
a colorless gas that is soluble in alcohol and ether |
|
|
sulphur hexafluoride |
Noun
|
a colorless gas that is soluble in alcohol and ether |
|
|
sunstone |
Noun
|
a translucent quartz spangled with bits of mica or other minerals |
|
|
superoxide |
Noun
|
the univalent anion O2- |
|
|
superoxide |
Noun
|
a metallic oxide containing the univalent anion O2- |
|
|
superoxide dismutase |
Noun
|
an enzyme that catalyzes the conversion of superoxide into hydrogen peroxide and oxygen |
|
|
surgical spirit |
Noun
|
methylated spirit used in the practice of medicine (especially for cleansing the skin before injections or before surgery) |
|
|
swinging chad |
Noun
|
a chad that is incompletely removed and still attached at two corners |
|
|
sylvanite |
Noun
|
a silver-white mineral consisting of silver gold telluride |
|
|
sylvite |
Noun
|
a mineral consisting of native potassium chloride |
|
|
sylvine |
Noun
|
a mineral consisting of native potassium chloride |
|
|
siderophilin |
Noun
|
a globulin in blood plasma that carries iron |
|
|
spermaceti |
Noun
|
a white waxy substance from oil of the sperm whale |
|
|
shellac wax |
Noun
|
a hard wax separated from shellac by its insolubility in alcohol |
|
|
surfactant |
Noun
|
a chemical agent capable of reducing the surface tension of a liquid in which it is dissolved |
|
|
surface-active agent |
Noun
|
a chemical agent capable of reducing the surface tension of a liquid in which it is dissolved |
|
|
softwood |
Noun
|
wood that is easy to saw, from conifers such as pine or fir |
|
|
standard time |
Noun
|
the official time in a local region (adjusted for location around the Earth) |
|
|
sulfuric acid |
Noun
|
(H2SO4) a highly corrosive acid made from sulfur dioxide |
|
|
sulphuric acid |
Noun
|
a highly corrosive acid made from sulfur dioxide |
|
|
sphalerite |
Noun
|
an ore that is the chief source of zinc |
|
|
summer |
Noun
|
the period of finest development, happiness, or beauty |
|
|
summer |
Noun
|
the warmest season of the year |
|
|
summer |
Verb
|
spend the summer |
|
|
second childhood |
Noun
|
mental infirmity as a consequence of old age |
|
|
solar day |
Noun
|
time for Earth to make a complete rotation on its axis |
|
|
schooldays |
Noun
|
the time of life when you are going to school |
|
|
schooltime |
Noun
|
the time of life when you are going to school |
|
|
schooltime |
Noun
|
the period of instruction in a school |
|
|
slow time scale |
Noun
|
(simulation) the time scale used in data processing when the time-scale factor is greater than one |
|
|
sell-by date |
Noun
|
a date stamped on perishable produce indicating the date by which it should be sold |
|
|
sixties |
Noun
|
the time of life between 60 and 70 |
|
|
sixties |
Noun
|
the decade from 1960 to 1969 |
|
|
seventies |
Noun
|
the time of life between 70 and 80 |
|
|
seventies |
Noun
|
the decade from 1970 to 1979 |
|
|
sabbatical leave |
Noun
|
a leave usually taken every seventh year |
|
|
sabbatical year |
Noun
|
a sabbatical leave lasting one year |
|
|
shore leave |
Noun
|
leave granted to a sailor or naval officer |
|
|
sick leave |
Noun
|
a leave of absence from work because of illness |
|
|
salad days |
Noun
|
the best time of youth |
|
|
spacecraft event time |
Noun
|
the coordinated universal time on board the spacecraft |
|
|
shelf life |
Noun
|
the length of time a packaged food or drug will last without deteriorating |
|
|
spacecraft clock time |
Noun
|
the clock time given by a clock carried on board a spacecraft |
|
|
suppertime |
Noun
|
the customary or habitual hour for the evening meal |
|
|
solar calendar |
Noun
|
a calendar based on solar cycles |
|
|
small hours |
Noun
|
the hours just after midnight |
|
|
sunup |
Noun
|
the first light of day |
|
|
sundown |
Noun
|
the time in the evening at which the sun begins to fall below the horizon |
|
|
saint's day |
Noun
|
a day commemorating a saint |