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An article is a word that combines with a noun to indicate the type of reference being made by the noun.
3
votes
Accepted
a lb or an lb, which is right?
I wouldn't generally use the abbreviation in a sentence. The letters "lb" are a unit and are used with a number. So it is valid to write "1 lb" or "5 m" or "1.4 kg", but you shouldn't write "I'll hav …
3
votes
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English Articles: Perilla oil is an/the edible vegetable oil derived from perilla seeds
Your natural sense is correct. There is a subtlety.
If we ask the question: What edible oil is derived from perilla seeds?
Perilla oil is the edible vegetable oil derived from perilla seeds
wou …