Full record for Earth-normal adj.

Definition as normally found on earth, such as gravity or atmosphere
OED requirements antedating 1932
Earliest cite John W. Campbell, Jr., 'The Electronic Siege'
Comment Jeff Prucher submitted a cite from a 2002 reprint of Theodore Sturgeon's 1956 "The Skills of Xanadu".
Fred Galvin submitted a cite from a 1953 reprint of Hugh Frazier Parker's 1943 "The Sword of Johnny Damokles".
Fred Galvin submitted a cite from a 1996 reprint of Raymond Z. Gallun's 1935 "Derelict".
Fred Galvin submitted a cite from a 1949 reprint of Isaac Asimov's 1942 "Victory Unintentional".
Fred Galvin submitted a 1932 cite from John W. Campbell, Jr.'s "The Electronic Siege".
Fred Galvin submitted a 1953 cite from Idris Seabright's "The Altruists".
Fred Galvin submitted a 1952 cite from James Blish's "Bridge".
Fred Galvin submitted a 1956 cite from Milton Lesser's "Meet Miss Solar System"
. Fred Galvin submitted a cite from a 1957 reprint of Robert A. Heinlein's 1956 "Double Star".
Fred Galvin submitted a cite from a 1973 reprint of Lin Carter's 1972 "Black Legion of Callisto".
Last modified 30 June, 2009

Citations for Earth-normal adj.

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1932 J. W. Campbell Electronic Siege in Wonder Stories Apr. 1249/1 Like the Patrol cruisers, the lifeless, defenseless ship careened on through space, her acceleration dropping immediately to Earth normal as automatic machines took up the unconscious pilot's duties.
1935 Astounding Stories Oct. 25/2 Somewhere gravity plates continued to function in this ancient wreck, for he had weight here—perhaps one-third Earth-normal.
1949 I. Asimov Victory Unintentional in Invasion From Mars: Interplanetary Stories 147 They had six legs apiece, stumpy and thick, designed to lift tons against two and a half times normal Earth gravity. Their reflexes were that many times Earth-normal speed, to make up for the gravity.
1952 R. A. Heinlein Let. 16 July in R. A. Heinlein & V. Heinlein Grumbles from Grave (1990) 224 He has never felt full earth-normal gravity. Absolutely everything about Earth is strange to him.
1952 Astounding Sci. Fiction Feb. 73/1 None of us have to pretend that our living arrangements would keep us out of jail in Boston, or that they have to involve any Earth-normal excuses.
1952 R. A. Heinlein Let. 16 July in R. A. Heinlein & V. Heinlein Grumbles from Grave (1990) 224 He has never felt full earth-normal gravity. Absolutely everything about Earth is strange to him.
1956 M. Lesser Meet Miss Solar System in Fantastic Universe Apr. 53/2 They'd rigged up a force-field on Eros, holding out the black cold of interplanetary space and holding in Earth-normal atmosphere and artificial gravity for the benefit of the Chairman of the Board of Judges.
1956 R. A. Heinlein Double Star in Astounding Sci. Fiction Feb. 11/1 There are a dozen other details which can't be set down in words; the point is you have to be a spaceman when you do it, with a spaceman's alert body and unconscious balance—you have to live it. A city man blunders along on smooth floors all his life, steady floors with Earth-normal gravity, and will trip over a cigarette paper, like as not. Not so a spaceman.
1993 V. E. Mitchell Windows on Lost World ii.12 And it wasn't because a planet deviated from the Earth-normal conditions of the Enterprise.
1993 V. E. Mitchell Windows on Lost World ix.126 The creature had three triangular teeth that could have‥broken the carapace of an Earth-normal crab.
1997 W. Shatner Avenger vi. 45 The designers‥had specified a cylindrical aquarium, with an Earth-normal saltwater environment.
1998 W. Shatner et al. Spectre xi. 132 A display inside his helmet revealed that the exterior atmospheric pressure was 250 torr, about one-third Earth normal.