- millionThe cardinal number 1 000 000: 10⁶; a thousand thousand (1,000²).
- milleporeAny coral of the genus Millepora, having the surface nearly smooth, and perforated with very minute unequal pores, or cells.
- milli-In the International System of Units and other metric systems of units, one-thousandth of the unit to which it is prefixed; that is, multiplying the unit to which it is attached by 10⁻³. Symbol: m.
- millifoldthousandfold