|any of a number of polymers containing alternate silicon and oxygen atoms and that are fluid, resinous, rubbery, extremely stable in high temperatures, and water-repellent|
|the condition existing when a chemical reaction and its reverse reaction proceed at equal rates|
|1.||the act, process, or result of adding|
|2.||a person or thing that is added or acquired|
|3.||a mathematical operation in which the sum of two numbers or quantities is calculated. Usually indicated by the symbol +|
|4.||chiefly (US), (Canadian) a part added to a building or piece of land; annexe|
|5.||obsolete a title following a person's name|
|6.||(adverb) in addition also; as well; besides|
|7.||(preposition) in addition to besides; as well as|
|[C15: from Latin additiōn-, from addere to |
|addition (ə-dĭsh'ən) Pronunciation Key
The act, process, or operation of adding two or more numbers to compute their sum.
see in addition.