calamondin
noun
cal·a·mon·din ˌka-lə-ˈmän-dən 
: a small hybrid citrus tree (Citrofortunella microcarpa synonym Citrofortunella mitis synonym Citrus mitis) of warm regions cultivated chiefly as an ornamental
also : its small, tart, orange fruit resembling a mandarin or kumquat and yielding an acidic juice used especially as a flavoring agent or in beverages and marmalades
Note: While the calamondin has been widely grown in the Philippines and Indonesia, it is thought to be native to China.
Example Sentences
Recent Examples on the Web The three-foot-tall semi-dwarf calamondin — a plant native to the Philippines that produces sour, compact orange fruit thought to be a hybrid of a kumquat and a mandarin — has always thrived despite, rather than because of, my attempts at care. 
New York Times, 16 Apr. 2020 At the other end of the spectrum, kumquats and calamondin are most tolerant of the cold and rarely need to be covered. Calvin Finch, ExpressNews.com, 9 Jan. 2020 Kumquats, calamondin, Changsha tangerine and satsumas have the most cold tolerance. Calvin Finch, ExpressNews.com, 21 Nov. 2019 Calamansi (calamondin) is a type of tart orange, and its juice or extract is typically available in bottled and frozen form at Filipino markets. Bonnie S. Benwick, sacbee, 29 Aug. 2017 Calamansi (calamondin) is a type of tart orange, and its juice or extract is typically available in bottled and frozen form at Asian markets (like those on Washington Avenue). Philly.com, 24 Aug. 2017 Calamansi (calamondin) is a type of tart orange, and its juice or extract is typically available in bottled and frozen form at Filipino markets such as Filipino Global Supermarket in Falls Church. The Washington Post, NOLA.com, 18 Aug. 2017 See More
New York Times, 16 Apr. 2020 At the other end of the spectrum, kumquats and calamondin are most tolerant of the cold and rarely need to be covered. Calvin Finch, ExpressNews.com, 9 Jan. 2020 Kumquats, calamondin, Changsha tangerine and satsumas have the most cold tolerance. Calvin Finch, ExpressNews.com, 21 Nov. 2019 Calamansi (calamondin) is a type of tart orange, and its juice or extract is typically available in bottled and frozen form at Filipino markets. Bonnie S. Benwick, sacbee, 29 Aug. 2017 Calamansi (calamondin) is a type of tart orange, and its juice or extract is typically available in bottled and frozen form at Asian markets (like those on Washington Avenue). Philly.com, 24 Aug. 2017 Calamansi (calamondin) is a type of tart orange, and its juice or extract is typically available in bottled and frozen form at Filipino markets such as Filipino Global Supermarket in Falls Church. The Washington Post, NOLA.com, 18 Aug. 2017 See More Word History
Etymology
Tagalog kalamundíng
First Known Use
1890, in the meaning defined above