character polarity


character polarity
the inferred direction of change of a characters state in a phylogenetic tree. The direction is determined by reference to the character state in an outgroup

Dictionary of ichthyology. 2009.

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  • polarity — referring to the genealogical position (advanced or primitive) of a character state of a taxonomic character …   Dictionary of ichthyology

  • polarity — /poh lar i tee, peuh /, n. 1. Physics. a. the property or characteristic that produces unequal physical effects at different points in a body or system, as a magnet or storage battery. b. the positive or negative state in which a body reacts to a …   Universalium

  • polarity — po•lar•i•ty [[t]poʊˈlær ɪ ti, pə [/t]] n. pl. ties 1) Physics. a) phs the property or characteristic that produces unequal physical effects at different points in a body or system, as a magnet or storage battery b) phs the positive or negative… …   From formal English to slang

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  • outgroup —   In cladistics, an organism or group, closely related to, but not included within, the group under analysis, and used for comparative purposes with respect to character polarity determination.   See also sister group …   Expanded glossary of Cycad terms

  • chemical bonding — ▪ chemistry Introduction       any of the interactions that account for the association of atoms into molecules, ions, crystals, and other stable species that make up the familiar substances of the everyday world. When atoms approach one another …   Universalium


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