Css; no word wrap

I have a table column whos width is 300px; this table is filled dynamically by some AS. At any rate the style of the table is determined by a CSS sheet. Is there a way I can stop a line from going to a new line when it is longer than 300 pixels long (and hide the overflow?)

Basically this is an order sheet; with itemized lines. When a line goes longer than three hundred pixels it wraps and then throws off the rest of the table. If you need an example of what I am talking about please let me know so I can show and explain further.

-Ryan