FD

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FD

(1) See functional dependency.

(2) (Floppy Disk) For example, FD/HD refers to a computer with a floppy disk and hard disk. See floppy disk.

(2) (1) The hexadecimal equivalent of 254 in decimal or 11111101 in binary. See hex and hex chart.
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floor drain

typical floor drains
A fixture providing an opening in a floor to drain water into a plumbing system; in homes, usually fitted with a deep seal trap.
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.