|Noah Webster's Dictionary|
1. (n.) A flat round plate
2. (n.) A circular structure either in plants or animals; as, a blood disc, a germinal disc, etc. Same as Disk.
Disc (1 Occurrence)
Revelation 6:12 When the Lamb broke the sixth seal I looked, and there was a great earthquake, and the sun became as dark as sackcloth, and the whole disc of the moon became like blood. (WEY)