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(mineralogy) lepidocrocite
Lepidocrocite is a type of iron oxide mineral, which is reddish-brown in color.
(chemistry) oxide (binary compound of oxygen)
This oxide is a compound made up of oxygen and other elements.
thing (concrete, tangible) / (law) a corporeal object
What is this thing?
reddish-brown; auburn
His dog has reddish-brown fur.
(one) kind; type; species
This is a kind of flower.
minerals
This area is known for producing a variety of minerals.
(archaic) iron / (figuratively) something extremely strong
This iron has been used since ancient times.
oxidation, oxidization
Oxidation is a type of chemical reaction where a substance reacts with oxygen to form an oxide.
(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.
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