in trovenium

[Pref. intro- (q. v.), and Lat. vena a vein.] Bot .: The obscuration of the venation by the abnormally developed parenchyma, as in Hoya, . in-tro-version, s. [Lat. intro- =within, and versio a turning, from versus , pa. par. of ver to =to turn.] The act of introverting; the state of being introverted. †in-tro-vert', v . t . [Latin intro- =within, and ver to to turn.] 1. To turn in or inward. intrusive-rocks, s. pl. Geol.: Rocks of igneous origin which have forced their way through crevices or rents in sedimentary strata, or have broken them up. Intrusive sheets of eruptive rock may be distinguished from true lava-flows which have been subsequently overlaid conformably by sedimentary strata, by the fact that the rocks, both above and below the intrusive sheets, are altered at the contacts, while in the case of lava-flows the rocks over which they ran have been altered, but the deposits above them show no trace of metamorphism. in-trusive-ly, adv. [Eng. intrusive; -ly.] In an intrusive or intruding manner. in-trû-sive-ne , s. [Eng. intrusive; -ne .] The quality or state of being intrusive.