Pico-

Pico- (/ˈpaɪ.koʊ/ or /ˈpi.koʊ/; symbol p) is a metric prefix denoting a factor of one trillionth in the short scale (10^-12 or 0.000 000 000 001; one billionth in the long scale). Its usage was officially endorsed by CGPM in 1960. The prefix is borrowed from Spanish pico, meaning "speck".

External links

• BIPM website

SI prefixes

Prefix		Base 10	Decimal	English word		Adoption	Etymology
Name	Symbol			Short scale	Long scale		Language	Derived word
yotta	Y	1024	1000000000000000000000000	septillion	quadrillion	1991	Greek	eight
zetta	Z	1021	1000000000000000000000	sextillion	trilliard	1991	Latin	seven
exa	E	1018	1000000000000000000	quintillion	trillion	1975	Greek	six
peta	P	1015	1000000000000000	quadrillion	billiard	1975	Greek	five
tera	T	1012	1000000000000	trillion	billion	1960	Greek	four, monster
giga	G	109	1000000000	billion	milliard	1960	Greek	giant
mega	M	106	1000000	million		1873	Greek	great
kilo	k	103	1000	thousand		1795	Greek	thousand
hecto	h	102	100	hundred		1795	Greek	hundred
deca	da	101	10	ten		1795	Greek	ten
		100	1	one		–
deci	d	10−1	0.1	tenth		1795	Latin	ten
centi	c	10−2	0.01	hundredth		1795	Latin	hundred
milli	m	10−3	0.001	thousandth		1795	Latin	thousand
micro	μ	10−6	0.000001	millionth		1873	Greek	small
nano	n	10−9	0.000000001	billionth	milliardth	1960	Greek	dwarf
pico	p	10−12	0.000000000001	trillionth	billionth	1960	Spanish	peak
femto	f	10−15	0.000000000000001	quadrillionth	billiardth	1964	Danish	fifteen, Fermi
atto	a	10−18	0.000000000000000001	quintillionth	trillionth	1964	Danish	eighteen
zepto	z	10−21	0.000000000000000000001	sextillionth	trilliardth	1991	Latin	seven
yocto	y	10−24	0.000000000000000000000001	septillionth	quadrillionth	1991	Greek	eight

Category:SI prefixes

This article "Pico-" is from Wikipedia. The list of its authors can be seen in its historical and/or the page Edithistory:Pico-. Articles copied from Draft Namespace on Wikipedia could be seen on the Draft Namespace of Wikipedia and not main one.

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