peta-
pref.（前缀）
语源
pref.（前缀）
- One quadrillion (1015):
拍它，10的15次幂：
petahertz.
拍它赫兹
语源
- Alteration of penta- [from its representing the fifth power of a thousand]
Alteration of penta- [from its representing the fifth power of a thousand]
peta-
prefix
denoting 1015 ⇒
petametresP
Origin
C20: so named because it is the SI prefix after tera-; on the model of penta-, the prefix after tetra-peta-
Word Origin
1
a combining form used in the names of units of measure equal to one quadrillion (10 15) of a given base unit:
petabyte.
Origin
origin uncertain
Related Word
- petabyte
peta-a prefix denoting 1015 of a given unit, as in petahertz. Symbol: P
[alteration of penta- (see pent-), from the 5 in 10(5 × 3)]peta-
combining form
peta-electron volts
combining form
ETYMOLOGY International Scientific Vocabulary, modification of Greek penta- penta-
: quadrillion (1015)peta-electron volts
peta-
combining form
- (used in units of measurement) denoting a factor of 1015（用于计量单位）表示"1015": petabytes.
词源
from pe（n）ta （see PENTA- ）, based on the supposed analogy of tera- and tetra-.
1975 Physics Bull. Mar. 105/1The Committee also agreed to recommend that the 15th and 18th powers of 10 be assigned the names ‘peta’ (symbol P) and ‘exa’ (symbol E) respectively. [ sc. the International Committee of Weights and Measures (CIPM)]
1975 B.S.I. News Dec. 13/3 The Conference ..adopted the name peta, symbol P, for 1015 and exa, symbol E, for 1018. [ sc. the General Conference of Weights and Measures (CGPM)]
ORIGIN: from pe(n)ta- tera- , tetra- : cf. exa-
peta-
combining form. one quadrillion (1015) _____: Petahertz = one quadrillion hertz.
[probably < Greek root peta- spread out]
peta-
\ˈped.ə, ˈpetə\ combining form
Etymology: International Scientific Vocabulary, modification of Greek penta- penta-
: quadrillion
< peta-electron volts >
< peta-electron volts >
peta-
Etymology
Based on penta- (“five”) with the middle letter removed.
Prefix
| SI prefix | ||
| P | ||
| Previous: | tera- | |
| Next: | exa- | |
- In the International System of Units and other metric systems of units, multiplying the unit to which it is attached by 1015, a quadrillion. Symbol: P
Antonyms
Derived terms
English words prefixed with peta-