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单词 haplobiontic
释义

haplobionticadj.

Brit. /ˌhaplə(ʊ)bʌɪˈɒntɪk/, /ˌhaplə(ʊ)bɪˈɒntɪk/, U.S. /ˌhæploʊˌbaɪˈɑn(t)ɪk/, /ˌhæploʊˌbiˈɑn(t)ɪk/
Origin: Formed within English, by derivation; modelled on a German lexical item. Etymons: haplo- comb. form, -biont comb. form, -ic suffix.
Etymology: < haplo- comb. form + -biont comb. form + -ic suffix, after German haplobiontisch (N. Svedelius 1915, in Nova Acta Regiae Societatis Scientarum Upsaliensis 4 iv. 42). Compare diplobiontic adj.
Biology.
Designating a plant or fungus whose life cycle involves only one type of organism (which may be either haploid or diploid), without alternation of distinct free-living generations.
ΚΠ
1916 Amer. Naturalist 50 511 Svedelius proposes the term haplobiontic for red algae with this type of life history to be contrasted with diplobiontic forms.
1978 H. C. Bold & M. J. Wynne Introd. to Algae 12 This type of life cycle was..said to be haplobiontic, meaning that only a single type of free-living individual is involved in the life cycle.
1991 Brit. Phycol. Jrnl. 26 303 Sargassum possesses a haplobiontic, diploid type of life history; the dominant morph is the sporophyte and there is no alternation of generations.
2004 Amer. Jrnl. Bot. 91 1544/1 Green algae have a haplobiontic life cycle.
This entry has been updated (OED Third Edition, December 2013; most recently modified version published online March 2022).
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adj.1916
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