1. (cosmology) pertaining to M-theory inspired models of the universe in which the big bang corresponds to the collision of branes

Encyclopedia: Ekpyrotic

• first-class mail
• first-come-first-serve
• first-degree burn
• first-generation
• first-nighter
• first-order correlation
• first-place finish
• first-rate
• first-rater
• first-string
• first-time buyer
• first-year
• firstborn
• firsthand
• firstling
• firstly
• firth
• Firth of Clyde
• Firth of Forth
• FISA
• fisc
• fiscal
• fiscal policy
• fiscal year
• fiscally