It’s a universal. The rule for using “a” or “an” is based on pronunciation, not spelling.
It’s a universal. The rule for using “a” or “an” is based on pronunciation, not spelling. Despite being a vowel, the initial letter of the word universal produces a consonant sound, so it takes the indefinite article “a”.
His theory has become a universal principle.
His theory has become an universal principle.
More examples:
The therapy offers the prospect of a universal cure for a range of genetic disorders.
Where can I buy a universal socket?
In this paper, we provide a universal formula for calculating the shape of any egg.
This is a partial list of words that also begin with the vowel "u" but are preceded by the article “a”:
