1. Having two electronic devices in opposite phase

Encyclopedia: Push-pull

• febricity
• febrifuge
• febrile
• febrility
• February
• February 12
• February 14
• February 2
• February 22
• February 29
• February daphne
• February Revolution
• fecal
• fecal impaction
• fecal matter
• fecal occult test
• fecalith
• feces
• Fechner
• Fechner's law
• feck
• feckless
• fecklessly
• fecklessness
• fecula