Also found in: Wikipedia.
Related to tholin: Titan, Pluto, New Horizons


A reddish organic substance, found on the surface of icy bodies in the outer solar system, and formed by the exposure of simple organic compounds, such as ethane and methane, to ultraviolet radiation.

[Greek tholos, mud + -in (coined by Carl Sagan).]
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
References in periodicals archive ?
(1.) Duffy SW, Tabar L, Chen HH, Holmqvist M, Yen MF, Abdsalah S, Epstein B, Frodis E, Ljungberg E, Hedborg-Melander C, Sundbom A, Tholin M, Wiege M, Akerlund A Wu HM, Tung TS, Chiu YH, Chiu CP, Huang CC, Smith RA, Rosen M, Stenbeck M, Holmberg L.
There are several steps that should be taken to succeed in foreign language education, such as supporting teachers' professional development (Andrade & Evans, 2012), and taking students' interests, needs, and individual differences into consideration (Liu, 2012), extracurricular activities to support the development of foreign language skills (Tholin, 2008), using audio-visual aids and materials in the classroom effectively (Price, 2010; Boyraz, 2014), and appropriate assessment (Purpura, 2016).
"We don't yet understand the relationship between water ice and the reddish tholin colorants on Pluto's surface."
O descontrole alimentar e caracterizado pela perda do autocontrole e consumo demasiado de alimentos, com ou sem presenca de fome (Tholin e colaboradores, 2005).
An analysis of the reaction pathways leading to sustained tholin production in Titans upper atmosphere: a literature review.
Scientists believe the tholin particles form high in the atmosphere, where ultraviolet sunlight breaks apart and ionizes nitrogen and methane molecules and allows them to react with one another to form more and more complex negatively and positively charged ions.
Tholin, Rasmussen, Tynelius, and Karlsson (2005) added 3 items in order to avoid floor and ceiling effects in the Emotional Eating factor in a twin male sample.
"Alfa Laval has already established a partnership with Opcon concerning Opcon Powerbox for industrial applications which we are currently developing," Joakim Tholin, general manager at Alfa Laval's marine & diesel segment, said.
It's a "new day in Washington," exult leaders Scott Bernstein and Kathryn Tholin, as CNT's research and ideas are poised to be "incorporated into the framing of the Obama administration's urban policy."
Laboratory simulations of organic reactions in Titan-like gas mixtures produce solid refractory organic substances (tholin) and similar processes are expected to occur in Titan's atmosphere.
The increasing portion of impervious areas during urbanization and its effect on water has been well studied and documented (Tholin and Keifer 1960; Antoine 1964; Leopold 1968; Brater 1968; Lull and Sopper 1969).