Under the microscope, the trochal disk of the rotifer beat rhythmically, creating currents that drew in microscopic food particles.

Many archivists worry that disk rot could render decades of digital recordings unreadable.

The technician replaced the disk drive after it stopped reading the backup disks.

The museum displayed vintage computers surrounded by stacks of floppy disks from the 1980s.

Before installing the new OS, make sure the boot disk is properly formatted and contains the correct drivers.

The technician labeled the boot disks before storing them in the cabinet.

The museum displayed a rare floptical disk from the early 1990s alongside other obsolete storage media.

Many museums still keep their early computer backups on floptical disks.

In the lab, we examined the germinal disks under the microscope to study early embryonic cell division.

The biologist carefully examined the chicken egg's germinal disk under the microscope to determine if it was fertilized.