nail bed
US /ˈneɪl bed/
UK /ˈneɪl bed/

1.
lit unguéal
the part of the finger or toe under the nail
:
•
She painted her nails, being careful not to get polish on her nail bed.
Elle a verni ses ongles, en faisant attention de ne pas mettre de vernis sur son lit unguéal.
•
A healthy nail bed is usually pink.
Un lit unguéal sain est généralement rose.