Englishfor English speakers
a
Determinative
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A is used when the following word could be any of a certain type.
Compare "A book I saw on the shelf" and "The book I gave you yesterday".
a
Noun
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A is the first letter of the alphabet.
The letter "a" comes before "b".
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In some schools, an A is a very high grade.
Ron got an A on his earth science test.
in
Preposition
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Used to show that something is inside something else.
The cat is in the box.
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Used to show that someone is at home, or is available.
Is John in?
The Doctor is now in.
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Used to show movement towards the inside.
The rain came in through the window.
quadrat
noun
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(sciences) An area of land, marked for studying its plants, animals, soil, natural processes, etc.
quadrat
noun
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(metal type, obsolete) A quad; a blank metal block used to fill space in lines of type.
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(Egyptology) A virtual rectangular subdivision of a line or column of hieroglyphs within which a group of hieroglyphs is arranged.