piconewton
An SI unit of force equal to 10⁻¹² newtons. Symbol: pN
Metrology and inspection
166 entries in this trade.
picosecond
An SI unit of time equal to 10⁻¹² seconds. Symbol: ps
picosiemens
An SI unit of electrical conductance equal to 10⁻¹² siemens.
pollum
A historic unit of weight used in India, equal to 1 ounce plus 3.25 drams.
pycnometer
A vessel of precisely known volume used by weighing to determine the specific gravity or relative density of a liquid.
quantity
Property of a phenomenon, body, or substance, where the property has a magnitude that can be expressed as number and a reference.
quectogram
An SI unit of mass equal to 10⁻³⁰ grams. Symbol: qg
quectosecond
An SI unit of time equal to 10⁻³⁰ seconds. Symbol: qs
quettagram
An SI unit of mass equal to 10³⁰ grams. Symbol: Qg
quettametre
An SI unit of length equal to 10³⁰ metres. Symbol: Qm
quettasecond
An SI unit of time equal to 10³⁰ seconds. Symbol: Qs. (= sextillions of years, a hypothetical time span that is meaningless except in speculative contexts such as theoretical physics, philosophy, religion, and humorous hyperbole)
ronnagram
An SI unit of mass equal to 10²⁷ grams. Symbol: Rg
ronnametre
An SI unit of length equal to 10²⁷ metres. Symbol: Rm
ronnasecond
An SI unit of time equal to 10²⁷ seconds. Symbol: Rs. (= quintillions of years, a hypothetical time span that is meaningless except in speculative contexts such as theoretical physics, philosophy, religion, and humorous hyperbole)
rontogram
An SI unit of mass equal to 10⁻²⁷ grams. Symbol: rg
rontosecond
An SI unit of time equal to 10⁻²⁷ seconds. Symbol: rs
s
Abbreviation of scruple, a unit of mass in the apothecaries' system.
school bus
An informal approximate unit of measure, from the length of a typical public school bus, approximately 30 feet or 9 metres.
sverdrup
A unit of measure of volume transport, used in oceanography, equal to 1 million cubic metres per second.
teraampere
An SI unit of current equal to 10¹² amperes. Symbol: TA
teragram
An SI unit of mass equal to 10¹² grams. Symbol: Tg
terajoule
An SI unit of energy equal to 10¹² joules. Symbol: TJ
teralumen
An SI unit of luminous flux equal to 10¹² lumens. Symbol: T
terametre
An SI unit of length equal to 10¹² metres. Symbol: Tm
terasecond
An SI unit of time equal to 10¹² seconds. Symbol: Ts. (= 31709.8 years)
torr
A unit of pressure that is equal to approximately 0.001316 atmospheres or 133.3 pascals.
yoctoampere
An SI unit of electrical current equal to 10⁻²⁴ amperes. Symbol: yA
yoctogram
An SI unit of mass equal to 10⁻²⁴ grams. Symbol: yg
yoctokatal
An SI unit of catalytic activity equal to 10⁻²⁴ katals. Symbol: y
yoctoliter
An SI unit of volume equal to 10⁻²⁴ liters. Symbol: y
yoctolitre
An SI unit of volume equal to 10⁻²⁴ litres. Symbol: y
yoctometre
An SI unit of length equal to 10⁻²⁴ metres. Symbol: ym
yoctomole
An SI unit of amount of substance equal to 10⁻²⁴ moles. Symbol: ymol. The yoctomole is approximately 0.6 of an individual particle.
yoctosecond
An SI unit of time equal to 10⁻²⁴ seconds. Symbol: ys
yottagram
An SI unit of mass equal to 10²⁴ grams. Symbol: Yg
yottametre
An SI unit of length equal to 10²⁴ metres. Symbol: Ym
yottasecond
An SI unit of time equal to 10²⁴ seconds. Symbol: Ys. (= quadrillions of years, a hypothetical time span that is meaningless except in speculative contexts such as theoretical physics, philosophy, religion, and humorous hyperbole)
zeptogram
An SI unit of mass equal to 10⁻²¹ grams. Symbol: zg
zeptojoule
An SI unit of energy equal to 10⁻²¹ joules. Symbol: zJ
zeptoliter
An SI unit of volume equal to 10⁻²¹ liters. Symbol: z
zeptometre
An SI unit of length equal to 10⁻²¹ metres. Symbol: zm
zeptosecond
An SI unit of time equal to 10⁻²¹ seconds. Symbol: zs
zettagram
An SI unit of mass equal to 10²¹ grams. Symbol: Zg
zettahertz
An SI unit of frequency equal to 10²¹ hertz.
zettametre
An SI unit of length equal to 10²¹ metres. Symbol: Zm
zettasecond
An SI unit of time equal to 10²¹ seconds. Symbol: Zs. (= trillions of years, a hypothetical time span that is meaningless except in speculative contexts such as theoretical physics, philosophy, religion, and humorous hyperbole)