space-likeadj.

Brit.

/ˈspeɪslʌɪk/, U.S.

/ˈspeɪsˌlaɪk/

Origin: Formed within English, by derivation. Etymons: space n.¹, -like suffix.

Etymology: < space n.¹ + -like suffix.

Physics.

Resembling or having the properties of space; spec. designating an interval between two points in space-time that can in principle be observed to be separated only by space (that is, to occur at the same point in time as seen by a moving observer); relating to such an interval.Events separated by space-like intervals are causally unconnected: there is too much space between them for light to pass from one to the other (they lie outside each other's light-cones).

ΘΚΠ

the world > matter > physics > relativity > space-time > [adjective] > designating points in space-time

space-like1914

time-like1914

1914 L. Silberstein Theory of Relativity v. 148 The length, thus defined, of a four-vector may be either real, or purely imaginary, or nil, according as we have..a space-like, a time-like, or a singular vector.

1934 A. Huxley Beyond Mexique Bay 215 It may be possible to think of vast durations as composed of space-like fragments.

1989 R. Penrose Emperor's New Mind x. 449 In the case of special or general relativity, read ‘simultaneous spaces’ or ‘spacelike surfaces’..in place of ‘times’.

2007 Nature 19 Apr. p. vii/2 According to Bell's theorem, any theory based on the joint assumption of realism and locality (meaning that local events cannot be affected by actions in space-like separated regions) is at variance with certain quantum predictions.

This entry has been updated (OED Third Edition, December 2008; most recently modified version published online March 2022).

单词	space-like
释义	space-likeadj. Brit. /ˈspeɪslʌɪk/, U.S. /ˈspeɪsˌlaɪk/ Origin: Formed within English, by derivation. Etymons: space n.¹, -like suffix. Etymology: < space n.¹ + -like suffix. Physics. Resembling or having the properties of space; spec. designating an interval between two points in space-time that can in principle be observed to be separated only by space (that is, to occur at the same point in time as seen by a moving observer); relating to such an interval.Events separated by space-like intervals are causally unconnected: there is too much space between them for light to pass from one to the other (they lie outside each other's light-cones). ΘΚΠ the world > matter > physics > relativity > space-time > [adjective] > designating points in space-time space-like1914 time-like1914 1914 L. Silberstein Theory of Relativity v. 148 The length, thus defined, of a four-vector may be either real, or purely imaginary, or nil, according as we have..a space-like, a time-like, or a singular vector. 1934 A. Huxley Beyond Mexique Bay 215 It may be possible to think of vast durations as composed of space-like fragments. 1989 R. Penrose Emperor's New Mind x. 449 In the case of special or general relativity, read ‘simultaneous spaces’ or ‘spacelike surfaces’..in place of ‘times’. 2007 Nature 19 Apr. p. vii/2 According to Bell's theorem, any theory based on the joint assumption of realism and locality (meaning that local events cannot be affected by actions in space-like separated regions) is at variance with certain quantum predictions. This entry has been updated (OED Third Edition, December 2008; most recently modified version published online March 2022). < adj.1914
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