How to create an input field (HTML) that spans two lines

I want to be able to use an <input> field type of control but allow only two lines.

At the moment I am using two fields but was wondering if anyone can come up with a solution to allow input (similar to a textarea) but no more than two lines. I control the width etc of the field.

For reference, Jquery and Bootstrap 3 are loaded.

Any help much appreciated.