parmentier
/ˈpɑrmɑntieɪ/ or /ˌpɑrmɑnˈtiːər/Definitions
1. noun
A French army physician who served under Lafayette, and was a friend and collaborator of Antoine-Augustin Parmentier (1740-1813), who popularized the cultivation of potatoes in France.
“The parmentier was an advocate for the potato’s widespread adoption.”