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astroplankton
astroplankton n. 
/ˈastrəʊˌplaŋ(k)tən/, /ˈæstroʊˌplæŋkt(ə)n/ now historical hypothetical living material such as microorganisms or spores present in space, postulated as able to initiate or spread life on reaching a suitable environment; cf. panspermia n.Suggested by J. B. S. Haldane as a technique by which intelligent extraterrestrial beings could propagate living organisms.
Brit. /ˌastrəʊˈplaŋ(k)tən/
, /ˌastrəʊˈplaŋ(k)tən//ˈastrəʊˌplaŋ(k)tən/U.S. /ˌæstroʊˈplæŋkt(ə)n/
, /ˌæstroʊˈplæŋkt(ə)n//ˈæstroʊˌplæŋkt(ə)n/ΘΚΠ
the world > the universe > diffused matter > [noun] > astroplankton
astroplankton1954
the world > life > biology > organism > plankton > [noun] > types of
brit1838
limnoplankton1893
zooplankton1897
meroplankton1899
potamoplankton1899
pseudoplankton1899
cryoplankton1902
hypoplankton1902
microplankton1903
haloplankton1909
holoplankton1909
meroplankton1909
nanoplankton1912
neuston1928
aeroplankton1932
staph1933
astroplankton1954
picoplankton1978
1954 J. B. S. Haldane in New Biol. 16 25 One of the earliest parties to land on the moon should be able to look for astroplankton, that is to say spores and the like, in dust from an area of the moon which is never exposed to sunlight.
1975 Proc. Royal Soc. B. 189 141 The astroplankton could have been sent out deliberately by intelligent creatures.
2004 R. Spangenburg & K. Moser Carl Sagan iii. 66 The Moon..would also have received its share of raining ‘astro-plankton’, as Haldane called these alien microbes.
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as lemmas