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extravehicular activity
He is undergoing training for extravehicular activity.
engage in an extravehicular activity
He engaged in an extravehicular activity from the spaceship.
neither fish nor fowl, up in the air
His art style is unique, it's neither fish nor fowl.
(organic chemistry) an organic compound
The study of organic compounds is an important field in chemistry.
(inorganic chemistry) an inorganic compound
This inorganic compound plays an important role in chemical reactions.
(chemistry) a sandwich compound
Sandwich compounds are being studied in a branch of chemistry.
penny wise and pound foolish; you get what you pay for
He always buys cheap things, so in the end, it becomes 'penny wise and pound foolish'.
(chemistry) acidic oxide
Acidic oxides react with water to produce acids.
(chemistry) amphoteric oxide
Aluminum is an amphoteric oxide, it reacts with both acids and bases.
(chemistry) a peroxide
Peroxides play an important role in chemical reactions.
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