a mechanism consisting of a metal honeycomb through which hot fluids circulate; heat is transferred from the fluid through the honeycomb to the airstream that is created either by the motion of the vehicle or by a fan
heater consisting of a series of pipes for circulating steam or hot water to heat rooms or buildings
the middle area of the human torso (usually in front); "young American women believe that a bare midriff is fashionable"
an intermediate part or section; "A whole is that which has beginning, middle, and end"- Aristotle
time between the beginning and the end of a temporal period; "the middle of the war"; "rain during the middle of April"
between an earlier and a later period of time; "in the middle years"; "in his middle thirties"
of a stage in the development of a language or literature between earlier and later stages; "Middle English is the English language from about 1100 to 1500"; "Middle Gaelic"
a gradual decrease; as of stored charge or current
the process of gradually becoming inferior
the spontaneous disintegration of a radioactive substance along with the emission of ionizing radiation
an inferior state resulting from the process of decaying; "the corpse was in an advanced state of decay"; "the house had fallen into a serious state of decay and disrepair"
fall into decay or ruin; "The unoccupied house started to decay"
undergo decay or decomposition; "The body started to decay and needed to be cremated"