pico-
pref.（前缀）
语源
pref.（前缀）
- One-trillionth (10-12):
表示“万亿分之一”(10-12)：
picosecond.
一兆分之一秒 - Very small:
表示“微小的，极小的”：
picornavirus.
小核醣核酸病毒
语源
- Spanish pico [beak, small quantity]
西班牙语 pico [喙，少量] - from Latin beccus [beak]
源自 拉丁语 beccus [喙] - [of Celtic origin] influenced by Spanish picar [to prick] * see picaro
[来源于凯尔特语的] 受 西班牙语 picar的影响 [刺，扎] *参见 picaro
pico-
prefix
denoting 10–12 ⇒
picofaradp
Origin
from Spanish pico small quantity, odd number, peakpico-
Word Origin
1
a combining form meaning “one trillionth” (10 −12):
picogram.
Origin
< Spanish pico peak, beak, bit. See pic2
Related Words
- micromicro-
- picofarad
- picogram
- picornavirus
- picosecond
- picowave
pico-a prefix denoting 10-12 of a given unit, as in picofarad. Symbol: p
[Spanish pico odd number, peak]pico-
combining form
picogram
2. very small
picornavirus
combining form
ETYMOLOGY International Scientific Vocabulary, probably from Spanish pico small amount, literally, peak, beak
1. one trillionth (10-12) part ofpicogram
2. very small
picornavirus
pico-
combining form
- (used in units of measurement) denoting a factor of 10-12皮（可）; 微微; 万亿分之一：
-
picosecond.
- ■ very small表示“极小的”：
-
picornavirus.
词源
from Spanish pico, literally 'beak, peak, little bit'.
1915 W. H. Eccles WirelessTelegr. 18Symbols for multiples and sub-multiples{ddd}10-12{ddd}Pico-{ddd}p or µµ.
1947 Compt. Rend. de la 14me Conf. (UnionInternat. de Chimie) 115The following prefixes to abbreviations for the names of units should be used to indicate the specified multiples or sub-multiples of these units:..p pico- 10-12×.
1952 Wireless World Jan. 19/2 The suggestions to adopt new prefixes, ‘nano’ and ‘pico’ for small capacitance values, would permit any value to be expressed as a whole number.
1952 . [ see nano-]
1975 Physics Bull. Feb. 67/1A range of stabilized high voltage power supplies and picoammeters manufactured by V G Electronics Ltd will also be shown.
Ibid. June 249/2 (Advt. ),Sensitivities down to 1 microvolt, 10 picoamps, and 1 milliohm are founded on Keithley's lifetime of expertise in designing and building low-level instrumentation.
1963 Times 15 Feb. 8/1 The level of 150 picocuries over a three-month period is considered by scientists to be the tolerable limit for humanity.
1976 Globe & Mail (Toronto) 16 Jan. 1/3 The readings in 30 of these, however, are less than three picocuries of radon for each litre of air, the exposure level that Government standards allow the public. For workers in atomic plants, the standard is 30 picocuries a litre.
1926 Gloss. TermsElectr. Engin. (Brit. Engin. Stand. Assoc. ) 26Picofarad, a unit of electrostatic capacity equal to 10-12 farad. Symbol: µµF.
1945 Electronic Engin. XVII. 473/2At a working frequency of ½ Mc/s., a difference of about 1/10 picofarad can be readily observed.
1976 Gramophone Jan. 1283/1 A slight platform rise of up to about 2 dB from 12 kHz upwards was measured which I take to be a result of the Dual's low capacitance cable, whereas Shure recommend 400 to 500 pico-farads per channel.
1951 Picogram . [ see nanogrammes.v. nano-]
1967 Oceanogr. & MarineBiol. V. 271If carbon content is compared with the surface area of cells, the range of variation is smaller, 0·11 to 0·66 picograms/µ2. [ plankton]
1975 Williams & Wilson Biologist's Guide toPrinc. & TechniquesPract. Biochem. iii. 72It has very high sensitivity and can detect as little as one picogramme of these compounds.
1973 Sci. Amer. Sept. 160/2 (Advt. ),For electron probe sampling, hundreds of picoliter fluid droplets are positioned automatically under an electron beam.
1971 Physics Bull. Nov. 678/2The picovolt measuring system permits the detection of small voltages from sources at low temperatures which would be overwhelmed by thermal voltages in the leads to a room temperature instrument.
Ibid. 678/3The picovoltmeter will be useful for the measurement of low temperatures by means of thermocouples.
1967 D. H. Hamsher CommunicationSyst. Engin. Handbk. xvi. 10The noise power measurement without any weighting of the frequency response of the instrument is expressed usually in picowatts (10-12 watt = pw).
1977 Sci. Amer. Feb. 62/2At the earth station the 30-metre dish antenna collects a scant three picowatts of energy and feeds it into a low-noise receiver.
pico-
word-forming element used in making names for very small unites of measure, 1915 (formally adopted c.1952 as a scientific prefix meaning "one trillionth"), from Spanish pico "a little over, a small balance," literally "sharp point, beak," of Celtic origin (compare Gaulish beccus "beak").
ORIGIN: from Spanish pico beak, peak, little bit: see -o-
pico-
combining form.
one trillionth of a _____: Picofarad = one trillionth of a farad.
very small, as in picornavirus.
[< Spanish pico small number, peak]
pico-
combining form
Etymology: International Scientific Vocabulary, perhaps from Italian piccolo small — more at piccolo
: one trillionth (10-12) part of
< picofarad >
< picogram >
< picofarad >
< picogram >
pico-
Etymology
Italian piccolo (“small”).
Prefix
| SI prefix | ||
| p | ||
| Previous: | femto- | |
| Next: | nano- | |
- In the International System of Units and other metric systems of units, multiplying the unit to which it is attached by 10−12. Symbol: p