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单词 multicyclic
释义

multicyclicadj.

Brit. /ˌmʌltɪˈsʌɪklɪk/, U.S. /ˌməltiˈsɪklɪk/; see also multi- comb. form and cyclic adj.
Origin: Formed within English, by compounding. Etymons: multi- comb. form, cyclic adj.
Etymology: < multi- comb. form + cyclic adj. Compare earlier monocyclic adj., polycyclic adj., and multicycle adj. With sense 3 compare also acyclic adj., bicyclic adj.2, pentacyclic adj. at penta- comb. form 1, tetracyclic adj., tricyclic adj.
1. gen. Involving many cycles.
ΚΠ
1951 Ann. Math. Statistics 22 238 When a cyclic or multicyclic solution of a balanced incomplete block design is available the matrix N already obeys the condition.
1975 Proc. Soc. Exper. Biol. & Med. 148 1237 Exposure of WI-38 cells to ascorbic acid plus glutathione mixtures..suppressed multicyclic but not single-cycle growth of the virus.
1998 Bone Marrow Transplantation 21 123 Multicyclic, dose-intensive chemotherapy in breast cancer.
2. Geology. Produced by or having undergone many cycles of erosion and deposition.
ΘΚΠ
the world > the earth > structure of the earth > formation of features > sedimentation > [adjective] > cycle
multicycle1916
polycyclic1935
multicyclic1952
1952 Jrnl. Geol. (Chicago) 60 188/1 Four general types of landscapes, suggested by Bryan's (1943, pp. 472–473) classification of soils: (1) simple, monocyclic landscapes which can be fitted to the idealized cycle; (2) complex, multicyclic landscapes which require historical interpretation; (3) compound landscapes..; (4) exhumed landscapes.
1966 G. H. Dury Ess. Geomorphol. 128 The degree to which multi-cyclic bevelling is displayed varies widely.
1972 Science 3 Nov. 503/1 A large proportion of the grains appears to be multicyclic, having undergone several cycles of erosion and deposition.
1995 Trans. Royal Soc. S. Austral. 119 1 Interpretations of lateritised landscapes include differential dissection of a complete laterite profile on an uplifted peneplain surface, multicyclic landscapes successively lateritised [etc.].
3. Chemistry. = polycyclic adj. 3.
ΘΚΠ
the world > matter > chemistry > organic chemistry > [adjective] > organic structure > cyclic or ring compounds > polycyclic
polycyclic1903
multicyclic1961
1961 U.S. Patent 3,014,062 2 Only one double bond of the cyclododecatriene is used for the carboxylic acid synthesis..the remaining two double bonds simultaneously disappearing with formation of a multicyclic system.
1996 Biochemistry 35 2332 Thiostrepton is a highly modified multicyclic peptide antibiotic.
2000 Tetrahedron Lett. 41 5025 (title) First base induced opening of multicyclic guanines to isolable substituted imidazoles.
This entry has been updated (OED Third Edition, March 2003; most recently modified version published online March 2022).
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adj.1951
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