I like to fancy myself a seasoned traveler, so imagine my surprise when I learned I might be using the wrong term for a common type of luggage.

Growing up, my parents always said rollerboard in reference to wheeled suitcase, and I followed suit. But on a recent text thread, I noticed a friend wrote rollaboard, prompting me to question everything Ive ever believed.

But fortunately, Im not the only one who is confused. A very non-scientific online poll from 2010 found that 53% of respondents say rollaboard, 32% go with rollerboard and 15% have no idea.

Still, officially speaking, which is it? Rollaboard? Rollerboard? Roll-aboard? Roll Aboard? Something else entirely? I turned to some experts and the vast archives of the internet to find out.

Roll aboard was the original term, linguist and lexicographer Ben Zimmer told HuffPost. Rollaboard was trademarked by Robert Plath for his company Travelpro in 1991, though luggage appeared under the brand name Roll-Aboard as early as 1985.

Indeed, a 1985 advertisement in the New Jersey newspaper the Daily Record presents a collection of bags with the descriptor U.S. Luggage Roll-Aboard Group, available at M. Epsteins department store in Morristown.

[The ad] claims a trademark, but does not look like luggage on wheels, said etymologist Barry Popik , who also shared the ad with HuffPost, along with many other clippings.