The 'e' in the middle of "envelope" is an unstressed vowel.
a yearbook; an envelope with letters; an open box; a brain
I think you mean 9x12 envelope.
The most commonly used symbol for email is a representation of a paper envelope from the back, showing its folds. Different software use different versions of this design.
In ring theory, the symbol "env" typically refers to the "envelope" of a ring. The envelope of a ring is often associated with the smallest ring that contains a given subset or structure, encapsulating its properties in a broader context. Specifically, it may lead to the construction of a larger ring that retains certain algebraic features while allowing for additional operations or elements. The precise meaning can vary based on the context in which it is used.
Depending upon which symbol you mean, it usually means that symbol DOUBLED.
Place where I put my secrets
The word "envelope" when translated in Tagalog or Filipino (national language of the Philippines) would simply mean "sobre".
What symbol
You mean this symbol ♀??
Self-Addressed Stamped Envelope
The word is "envelope" (which usually holds only one letter).