millesimal /mi-lesˈi-məl/

1. Thousandth
2. Consisting of thousandth parts

A thousandth part

• headers
• header tank
• headfast
• headfasts
• head first
• head foremost
• headframe
• headframes
• headgear
• headgears
• head girl
• head girls
• head-hugger
• head-huggers
• headhunt
• headhunted
• headhunter
• headhunters
• headhunting
• headhuntings
• headhunts
• headier
• headiest
• headily
• headiness