Syncope and Elision
The word "every" is pronounced ev'ry. The second e sound is entirely eliminated. The technical words for the elimination of sounds are "syncope" and "elision". This specific sort of vowel sound elimination, or specific type of syncope, does not occur with great frequency, but it does occur in some common words. Pronouncing "camera" as "camera" instead of "cam'ra" would be an indication that English is not one's first language. The same thing goes for "chocolate", which is pronounced "choc'lət.
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Glossary of linguistic terms
vowel sound elimination.pdf download from The ESL EFL Pages
The speech of native speakers of American English that many consider to be typical of the United States, noted for its exclusion of phonological forms readily recognized as regional or limited to particular social groups and for its frequent use as a norm of pronunciation by national broadcasters.
USAGE NOTE The label General American is often used to describe a variety of speech that lacks any of the stereotypical markers of regional speech or of the speech of particular social groups, as in the omission of the (r) sound in words like car and card. It should be noted, however, that this label still permits a great deal of regional and social variation. In other words, General American should not be identified with any specific American accent.
