evocation

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e·vo·ca·tion

(ev'ō-kā'shŭn, ē-vō-kā'shŭn),
Induction of a particular tissue produced by the action of an evocator during embryogenesis.
[L. evoco, pp. evocatus, to call forth, evoke]

e·vo·ca·tion

(ev'ō-kā'shŭn)
Induction of a particular tissue produced by the action of an evocator during embryogenesis.
[L. evoco, pp. evocatus, to call forth, evoke]

evocation

the induction of embryonic tissue by a chemical stimulus, for example, ECTODERM produces neutral material in the vertebrate embryo due to an evocator (see ORGANIZER REGION from the underlying CHORDAMESODERM.