torrn.

Brit.

/tɔː/, U.S.

/tɔr/

Forms: Also Torr.

Etymology: < the name of Torricelli (see Torricellian adj.).

Physics.

A unit of pressure used chiefly in measuring partial vacuums (see quot. 1958¹); 133·32 newtons per square metre.

ΘΚΠ

the world > matter > physics > mechanics > force > [noun] > pressure > units of pressure

bar1903

torr1949

Pascal1956

Pa1964

1949 S. Dushman Sci. Found. Vacuum Technique i. 4 In German literature, 1 Tor (or 1 Torr) is used to designate 1 mm Hg pressure.

1958 Gloss. Terms Vacuum Technol. (B.S.I.) 7 Torr, a unit of pressure defined by the relationship: 760 torr = 1 standard atmosphere (atm) = 1 013 250 dyn/cm² exactly. 1 torr is equal to the conventional barometric millimetre of mercury..within 1 part in 7 × 10⁶.

1958 Gloss. Terms Vacuum Technol. (B.S.I.) 20 1 torr = 1·333 22 millibar (mb) approximately.

1981 J. B. Adams in J. H. Mulvey Nature of Matter vii. 151 It is necessary to achieve a very low pressure in the vacuum chamber; pressures of 10^–11 Torr are essential.

This entry has not yet been fully updated (first published 1986; most recently modified version published online March 2022).

单词	torr
释义	torrn. Brit. /tɔː/, U.S. /tɔr/ Forms: Also Torr. Etymology: < the name of Torricelli (see Torricellian adj.). Physics. A unit of pressure used chiefly in measuring partial vacuums (see quot. 1958¹); 133·32 newtons per square metre. ΘΚΠ the world > matter > physics > mechanics > force > [noun] > pressure > units of pressure bar1903 torr1949 Pascal1956 Pa1964 1949 S. Dushman Sci. Found. Vacuum Technique i. 4 In German literature, 1 Tor (or 1 Torr) is used to designate 1 mm Hg pressure. 1958 Gloss. Terms Vacuum Technol. (B.S.I.) 7 Torr, a unit of pressure defined by the relationship: 760 torr = 1 standard atmosphere (atm) = 1 013 250 dyn/cm² exactly. 1 torr is equal to the conventional barometric millimetre of mercury..within 1 part in 7 × 10⁶. 1958 Gloss. Terms Vacuum Technol. (B.S.I.) 20 1 torr = 1·333 22 millibar (mb) approximately. 1981 J. B. Adams in J. H. Mulvey Nature of Matter vii. 151 It is necessary to achieve a very low pressure in the vacuum chamber; pressures of 10^–11 Torr are essential. This entry has not yet been fully updated (first published 1986; most recently modified version published online March 2022). < n.1949
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