Definitions
Century Dictionary and Cyclopedia
- In botany, having five cycles: said of flowers in which the floral organs are in five cycles or whorls. Compare monocyclic, bicyclic, etc.
Wiktionary
- adj. chemistry having five rings, especially five fused rings as in many triterpenoids
Examples
“These products are: two saturated chains aliphatic hydrocarbons (C33H68 and C35H72), saccharose, two pentacyclic triterpenes of the ursane group (alpha-amyrine, urs-12-ene-3-one), a new polymethoxy flavonoid”
“Platensimycin contains a pentacyclic motif with a cyclic ether ring, whereas platencin contains a unique tetracyclic motif without the ether ring”
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