| 单词 | reciprocal crosses |
| 释义 | reciprocal /ri-sipˈrə-kl/adjective
ORIGIN: L reciprocus reciprocality /-kalˈi-ti/ noun recipˈrocally adverb recipˈrocant noun (mathematics) A differential invariant recipˈrocāte transitive verb
reciprocāˈtion noun recipˈrocātive adjective Characterized by or inclined to reciprocation recipˈrocātor noun
reciprocity /res-i-prosˈi-ti/ noun
reciprocal cross noun (biology) A cross made both ways with regard to sex, ie A♂×B♀ and B♂×A♀ reciprocal translocation noun (biology) Mutual exchange of non-homologous portions between two chromosomes reciprocating engine noun An engine in which the piston moves to and fro in a straight line reciprocity failure noun (photography) Failure of the reciprocity rule for extremely long or short exposure times, or at very high or low light intensities reciprocity principle noun (physics) One stating that the interchange of radiation source and detector will not change the level of radiation at the latter, whatever the shielding arrangement between them reciprocity rule noun (photography) The principle that an increase in light intensity should be compensated for by a proportionate decrease in time exposure and vice versa |
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