Full record for Earth-type adj.

Definition	'like the planet Earth', usually in the phrase 'an earth-type planet'
OED requirements	antedating 1941
Earliest cite	Robert A. Heinlein, Methuselah's Children
Comment	Mike Christie submitted a cite from 1956. Enoch Forrester submitted a cite from a 1983 reprint of Andre Norton's "The Stars Are Ours!"; Mike Christie verified it in a 1955 reprint. We would like to check the 1954 first edition. Cory Panshin submitted a cite from a 1957 reprint of Poul Anderson and Gordon Dickson's "Earthman's Burden"; we would like to check the 1951 original appearance of the story, "Heroes Are Made", in Other Worlds Science Stories. Imran Ghory submitted a cite from a 1955 reprint of J. Francis McComas' "Shock Treatment"; we would like to check the 1954 first edition. Katrina Campbell submitted a 1980 cite from Malcolm Edwards and Robert Holdstock's "Tour of the Universe". Douglas Winston submitted a 1966 cite from Murray Leinster's "Quarantine World". Douglas Winston submitted a 1988 cite from Kevin Randle and Robert Cornett's "The Aldebaran Campaign". Douglas Winston submitted a 1967 cite from Patrick Meadows' "Virtue. 'Tis a Fugue!". Mike Christie submitted a 1941 cite from Robert Heinlein's "Methuselah's Children".
Last modified	6 July, 2008

Citations for Earth-type adj.

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1944 ‘H. Clement’ Trojan Fall in Astounding Sci. Fiction June 58/2	He was reasonably certain of finding a habitable planet; the star that lacked worlds was the exception rather than the rule. Earth-type worlds were rarer, but frequent enough to have forced the enactment of several regulations against unrestricted colonization.
1956 C. D. Simak in Galaxy Oct. 106/1	It's Earth-type, oxygen, and the climate's fine so far.
1988 K. Randle & R. Cornett Aldebaran Campaign 56	If the planet hadn't had an Earth-type atmosphere, we'd have had to go in wearing environment suits and set up our own biosphere shelter so we could occasionally stand-down without the suits. Living in an environment suit is a bitch.
1994 Interzone July 9/1	The search was soon switched to Earthtype planets, and these proved difficult to find.