The minimum temperature at which a material will combust.
Illiquid
An investment that cannot be quickly sold or converted to cash without incurring a significant loss. Real estate is generally an illiquid investment.
Illiquidity
(1) Inadequate cash to meet obligations. Real estate is an illiquid asset because of the time and effort required to convert it to cash. (2) A characteristic of an investment indicating an inability to sell or convert to cash in a short period.
Illuminance
A measure of the amount of light incident on a surface; measured in foot-candles or Lux.
Illuminate
(1) To light up. To brighten. (2) To explain or make clear.
Immersion
A term referring to something submerged in water.
Impact fees
Fees that must be paid by developers of new homes and subdivisions to pay for town facilities such as schools and parks.
Impact noise rating
Rating system to indicate how much noise is transferred through a ceiling or floor when walking or moving furniture.
Impact resistance
Ability to ward off damage that occurs from a sudden force.
Impact resistant glass
Glass formed where two pieces of annealed glass are bonded together with an interlayer that holds the glass in the window frame even when it is broken or shattered. Similar technology is used to make automobile windshields; the difference is that windshields are tempered.
