ff or ff.

1. Fecerunt (Latin), (they) did it or made it
2. Folios (printing)
3. Following pages, lines, etc
4. Fortissimo (music)

FF

1. Form feed (computing)
2. French franc or francs

• hyperextend
• hyperextended
• hyperextending
• hyperextends
• hyperextension
• hyperextensions
• hyperfine
• hyperfine structure
• hyperfocal distance
• hyperfocal distances
• hypergamies
• hypergamous
• hypergamy
• hyperglycaemia
• hyperglycaemias
• hyperglycemia
• hyperglycemias
• hypergolic
• hyperhidroses
• hyperhidrosis
• hyperhydroses
• hyperhydrosis
• Hypericaceae
• hypericin
• Hypericum