catenane (plural catenanes)
(organic chemistry) Any compound, especially a hydrocarbon, having two or more rings interconnected like the links of a chain, without a covalent bond.
• The number of rings in the compound is shown by preceding the name with a number in square brackets e.g. [3]catenane.
Source: Wiktionary
22 December 2024
(noun) (plural) spectacles that are darkened or polarized to protect the eyes from the glare of the sun; “he was wearing a pair of mirrored shades”
The earliest credible evidence of coffee-drinking as the modern beverage appeared in modern-day Yemen. In the middle of the 15th century in Sufi shrines where coffee seeds were first roasted and brewed for drinking. The Yemenis procured the coffee beans from the Ethiopian Highlands.
