idioblast

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idioblast

[′īd·ē·ō‚blast]
(botany)
A plant cell that differs markedly in shape or function from neighboring cells within the same tissue.
(geology)
A mineral constituent of a metamorphic rock formed by recrystallization which is bounded by its own crystal faces.
References in periodicals archive ?
Garnet (20%) occurs as fractured pinkish idioblastic to xenoblastic porphyroblasts of average diameter up to 5 mm and skeletal to poiquiloblastic character.
FIGURE 5a displays a small idioblastic textural sector-zoned garnet, without sigmoidal pattern of zoning, partly included in a staurolite porphyroblast, which contains a pattern of inclusions of quartz and ilmenite concordant to the main foliation of the rock.
As found in the tribe Spathicarpeae and in the subfamily Lemnoideae, articulated tubes (Ta) are encountered where the idioblastic raphide cells are in contact and may attach end to end.