Englishfor English speakers
professor
Noun
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A professor is a teacher at a college or university.
Dr. Erickson and Dr. Karrow are my favorite professors.
x
Noun
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X is the twenty-fourth (24th) letter of the alphabet.
"x" comes after "w" and before "y"
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This is the Roman numeral for ten (10). It may be written as X or x.