The expression “coffee break” was first attested in 1952 in glossy magazine advertisements by the Pan-American Coffee Bureau.
alkene, olefine, olefin
(noun) any unsaturated aliphatic hydrocarbon
Source: WordNet® 3.1
alkene (plural alkenes)
(organic compound) An unsaturated, aliphatic hydrocarbon with one or more carbon–carbon double bonds
• Keelan
Source: Wiktionary
5 May 2025
(adjective) not developed, improved, exploited or used; “vast unexploited (or undeveloped) natural resources”; “taxes on undeveloped lots are low”
The expression “coffee break” was first attested in 1952 in glossy magazine advertisements by the Pan-American Coffee Bureau.