g —used before the name of a day of the week to refer to one occurrence of it Christmas falls on a Tuesday this year.
In speech and writing a is used before a consonant sound. a door a human Before a vowel sound an is usual an icicle an honor but especially in speech a is used occasionally, more often in some dialects than in others.
perhaps from -a- in ring compounds such as thiazole (in which -a- is the initial of azole)
1 : someone or something being mentioned for the first time There's a dog in the yard.
What made you want to look up a? Please tell us where you read or heard it (including the quote, if possible).
The <a> tag defines a hyperlink, which is used to link from one page to another.
Tip: If the <a> tag has no href attribute, it is only a placeholder for a hyperlink.
Despite its diminutive size, à is a hugely important French preposition and one of the most important words in the French language. Its meanings and uses in French are many and varied, but at its most basic, à generally means 'to,' 'at' or 'in.' Compare à to de, meaning 'of' or 'from,' with which it's often confused.
The French preposition à is required after certain verbs and phrases when they are followed by an infinitive. The English translation may take an infinitive (to learn how to do something) or a gerund (to stop eating).
It is a character encoding issue. Whom ever is sending the mail is using a character set that is not appropriate.
I have had the same problem with the  character inserted into emails that I have received from some others, and almost always those I have received from myself. I am on WinXP SP3 with whatever are the final updates available there, I am running Tbird 31.1.1 . Mozilla seems to have made changes to how it handles ( or now, mishandles) font displays.