pellicle /pelˈi-kl/

1. A thin skin or film
2. A film or scum on liquid
3. A protein covering that preserves the shape of single-cell organisms (biology)

• head girls
• head-hugger
• head-huggers
• headhunt
• headhunted
• headhunter
• headhunters
• headhunting
• headhuntings
• headhunts
• headier
• headiest
• headily
• headiness
• headinesses
• heading
• headings
• headlamp
• headlamps
• headland
• headlands
• headlease
• headleases
• headless
• headlight