undecagon
(noun) an eleven-sided polygon
Source: WordNet® 3.1
undecagon (plural undecagons)
(geometry) A polygon with eleven sides and eleven angles.
• 11-gon
• hendecagon
Source: Wiktionary
Un*dec"a*gon, n. Etym: [L. undecim eleven + Gr. (Geom.)
Definition: A figure having eleven angles and eleven sides.
Source: Webster’s Unabridged Dictionary 1913 Edition
29 April 2024
(noun) a geological process in which one edge of a crustal plate is forced sideways and downward into the mantle below another plate
The first coffee-house in Mecca dates back to the 1510s. The beverage was in Turkey by the 1530s. It appeared in Europe circa 1515-1519 and was introduced to England by 1650. By 1675 the country had more than 3,000 coffee houses, and coffee had replaced beer as a breakfast drink.
