floating head
In computing, a read/write head that floats on a thin air cushion above the disk surface, as in hard disk drives.
ハードディスクの浮動ヘッドは、ディスク表面からわずかに浮いている。
The floating head of a hard disk floats slightly above the disk surface.
Compound of 浮動 (ふどう, 'floating') and ヘッド ('head'), a direct calque of the English term 'floating head'.