the principle that experiments on physical systems of atomic size or smaller, as electrons or photons, can exhibit either particle or wave behavior but not both simultaneously.
- Complementary air
complementary air com·ple·men·ta·ry air (kŏm’plə-měn’tə-rē, -trē) n. See inspiratory capacity.
noun, Mathematics. 1. either of two angles that added together produce an angle of 90°. noun 1. either of two angles whose sum is 90° Compare supplementary angle
noun, Genetics. 1. either of the nucleotide bases linked by a hydrogen bond on opposite strands of DNA or double-stranded RNA: guanine is the complementary base of cytosine, and adenine is the complementary base of thymine in DNA and of uracil in RNA.
plural noun, Botany. 1. cells fitting closely together in the lenticel.
- Complementary closing
noun complimentary close Examples We all could use a list of complementary closings so we stop using the same tired ones. Word Origin complements’ the salutation