astrochemistry

as·tro·chem·is·try

[as-troh-kem-uh-stree]
noun
a branch of astronomy and chemistry dealing with the chemical composition and evolution of the universe and its parts.

Origin:
1970–75; astro- + chemistry

as·tro·chem·i·cal [as-troh-kem-i-kuhl] , adjective
as·tro·chem·i·cal·ly, adverb
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Based on the Random House Dictionary, © Random House, Inc. 2013.
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Collins
World English Dictionary
astrochemistry (ˌæstrəʊˈkɛmɪstrɪ) [Click for IPA pronunciation guide]
 
n
the study of the chemistry of celestial bodies and space, esp by means of spectroscopy

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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Astrochemistry is always a great word to know.
So is lollapalooza. Does it mean:
an extraordinary or unusual thing, person, or event; an exceptional example or instance.
a stew of meat, vegetables, potatoes, etc.
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