tetracyclicadj.
/tɛtrəˈsʌɪklɪk/, /tɛtrəˈsɪklɪk/, U.S. /ˌtɛtrəˈsaɪklɪk/ 1. Having four cycles or circles; spec. in Botany, having four whorls of floral organs.
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the world > plants > part of plant > reproductive part(s) > flower or part containing reproductive organs > [adjective] > having specific arrangement or number of member parts
regular1760
decandrous1808
irregular1826
tetramerous1835
pentamerous1848
symmetrical1849
hexamerous1857
isomerous1857
octamerous1857
anisomerous1861
octomeral1871
hemicyclic1875
zygomorphic1875
zygomorphous1879
tetracyclic1880
heteromerous1882
heterocyclic1895
oligomerous1897
pleiomerous1898
decasepalous-
1880 W. R. McNab Bot.: Outl. Morphol. & Physiol. ix. 161 Dicotyledones... Flowers typically tetracyclic pentamerous.
2. Chemistry. Of a compound: containing four fused hydrocarbon rings in the molecule.
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the world > matter > chemistry > organic chemistry > [adjective] > organic structure > cyclic or ring compounds > tetracyclic
tetracyclic1928
1928 Chem. Abstr. 22 2748 (heading) Synthesis of tetracyclic compounds and of pyrene.
1977 J. L. Harper Population Biol. Plants xiii. 414 Plants that are only lightly predated contained three or four isomers of lupanine and closely related tetracyclic compounds.
This entry has not yet been fully updated (first published 1986; most recently modified version published online March 2022).
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adj.1880