yocto-

a combining form used in the names of units of measure equal to one septillionth (10 ^-24) of a given base unit.

yocto-/ˈjɒktoʊ/ (say 'yoktoh)

a prefix denoting 10^-24, as in yoctohertz. Symbol: y See yotta-.

[alteration of Italian otto eight, from Latin octa, from the 8 in 10^{(8 × -3)}]

yoc·to-
combining form

ETYMOLOGY International Scientific Vocabulary, alteration of octo-; from the fact that 10²⁴ is the eighth power of 10³

: one septillionth (10^-24) part of
yoctosecond

yocto-

/ˈjɒktəʊ/

combining form

(used in units of measurement) denoting a factor of 10^-24 （用于度量单位）表示“幺（科托）”（系数为10^-24）：: yoctojoule.

词源

adapted from OCTO-, on the pattern of combining forms such as peta- and exa-.

yocto-
combining form
Etymology: International Scientific Vocabulary, probably blend of yotta- (herein) and octo-
: one septillionth (10^-24) part of
< yoctosecond >

yocto-

Etymology

Ancient Greek ὀκτώ (oktṓ, “eight”), for the eighth order of 10⁻³. The letter y was added, as the second term in a series running backwards through the alphabet.

Prefix

SI prefix
y
	Previous:	n/a
	Next:	zepto-

In the International System of Units and other metric systems of units, multiplying the unit to which it is attached by 10⁻²⁴. Symbol: y

Antonyms

yotta-

Derived terms

yoctoampere

yoctobecquerel

yoctocoloumb

yoctofarad

yoctogram

yoctogray

yoctohenry

yoctojoule

yoctometer / yoctometre

yoctosecond

词根词缀：yocto-

【来源及含义】Greek: from octo-, "eight"; a decimal prefix used in the international metric system for measurements

【相关词根词缀】 Related "metric" families: yotta; zetta; exa; peta; tera; giga; mega; kilo; hecto; deka; deci; centi; milli; micro; nano; pico; femto; atto; zepto.

【同源单词】yoctogram, yoctowatt

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