pon·to·nier
(pŏn′tə-nîr′)n. One who is in charge of pontoons or is engaged in the construction of pontoon bridges.
[French pontonnier, from Old French, from ponton, pontoon; see pontoon.]
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
pontonier
(ˌpɒntəˈnɪə) or pontonnier
n (Military) military obsolete a person in charge of or involved in building a pontoon bridge
[C19: from French pontonnier, from Latin pontō ferry boat, pontoon1]
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014