1. Lacking substance or reality; incapable of being touched or seen
   - intangible

See also: immaterial, nonmaterial

• femoral vein
• femoris
• femto-
• femtochemistry
• femtometer
• femtometre
• femtosecond
• femtovolt
• femur
• fen
• fen orchid
• fen orchis
• fence
• fence in
• fence line
• fence lizard
• fence mending
• fence rail
• fencelike
• fencer
• fencer's mask
• fencesitter
• fencing
• fencing mask
• fencing material