1. Concave on both sides
   - biconcave

See also: concave

• multiplexer
• multiplicable
• multiplicand
• multiplication
• multiplication sign
• multiplication table
• multiplicative
• multiplicative inverse
• multiplicatively
• multiplicity
• multiplied
• multiplier
• multiplier factor
• multiplier onion
• multiply
• multipolar
• multipotent
• multiprocessing
• multiprocessor
• multiprogramming
• multipurpose
• multiracial
• multistage
• multistage rocket
• multistorey