from Wiktionary, Creative Commons Attribution/Share-Alike License

  • adj. having five rings, especially five fused rings as in many triterpenoids

from The 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.


Sorry, no etymologies found.


  • 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

    Chapter 12

  • Platensimycin contains a pentacyclic motif with a cyclic ether ring, whereas platencin contains a unique tetracyclic motif without the ether ring

    PLoS ONE Alerts: New Articles


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