FSSD has various meanings in the File Extensions category. Discover the full forms, definitions, and usage contexts of FSSD in File Extensions.
To measure the depth of the water with a lead. Also said of a whale when it dives to the bottom. Narrow expanse of water between two land masses. Sound waves of a frequency (less than 3800 per second) that can be detected by the human ear.
File ExtensionsLast updated: