poikiloblasticadj.

Brit.

/ˌpɔɪkɪlə(ʊ)ˈblastɪk/, U.S.

/pɔɪˌkɪləˈblæstɪk/,

/ˈˌpɔɪkəloʊˈblæstɪk/

Forms: 1900s– poeciloblastic, 1900s– poikiloblastic.

Origin: Formed within English, by compounding; modelled on a German lexical item. Etymons: poikilo- comb. form, -blastic comb. form.

Etymology: < poikilo- comb. form + -blastic comb. form, after German poikiloblastisch (F. Becke 1904, in Congr. Géol. Internat.: Comptes Rendus 9me Sess. 1903 II. 570).

Geology.

Of the structure or texture of a metamorphic rock: containing small crystals of an original mineral enclosed within crystals of its metamorphic product. Of a rock or mineral: displaying such a structure. Cf. poikilitic adj. 2.

ΘΚΠ

the world > the earth > minerals > mineral structure or appearance > [adjective] > enclosure

ocellar1886

poikilitic1886

hyalopilitic1888

poikiloblastic1920

the world > the earth > structure of the earth > constituent materials > rock > texture or colour > [adjective] > texture > embedded crystals

ophitical1611

ophitic1870

poikilitic1886

hyalopilitic1888

miarolitic1889

hyalo-ophitic1920

poikiloblastic1920

porphyroblastic1920

porphyroclastic1920

1920 A. Holmes Nomencl. Petrol. 187 Poikiloblastic, a metamorphic texture due to the development, during recrystallisation, of a new mineral around numerous relics of the original minerals, thus simulating the poikilitic texture of igneous rocks.

1932 A. Harker Metamorphism xiii. 191 (caption) A large porphyroblast of green hornblende showing typical pœciloblastic or sieve-structure.

1990 Jrnl. Petrol. 31 638 The poikiloblastic garnets are either unzoned (As-84) or ‘normally’ zoned (As-79).

2003 Jrnl. Geochem. Explor. 80 41 A salient feature of the apatite is its poikiloblastic texture (with inclusions of quartz and iron oxides).

This entry has been updated (OED Third Edition, September 2006; most recently modified version published online March 2022).

单词	poikiloblastic
释义	poikiloblasticadj. Brit. /ˌpɔɪkɪlə(ʊ)ˈblastɪk/, U.S. /pɔɪˌkɪləˈblæstɪk/, /ˈˌpɔɪkəloʊˈblæstɪk/ Forms: 1900s– poeciloblastic, 1900s– poikiloblastic. Origin: Formed within English, by compounding; modelled on a German lexical item. Etymons: poikilo- comb. form, -blastic comb. form. Etymology: < poikilo- comb. form + -blastic comb. form, after German poikiloblastisch (F. Becke 1904, in Congr. Géol. Internat.: Comptes Rendus 9me Sess. 1903 II. 570). Geology. Of the structure or texture of a metamorphic rock: containing small crystals of an original mineral enclosed within crystals of its metamorphic product. Of a rock or mineral: displaying such a structure. Cf. poikilitic adj. 2. ΘΚΠ the world > the earth > minerals > mineral structure or appearance > [adjective] > enclosure ocellar1886 poikilitic1886 hyalopilitic1888 poikiloblastic1920 the world > the earth > structure of the earth > constituent materials > rock > texture or colour > [adjective] > texture > embedded crystals ophitical1611 ophitic1870 poikilitic1886 hyalopilitic1888 miarolitic1889 hyalo-ophitic1920 poikiloblastic1920 porphyroblastic1920 porphyroclastic1920 1920 A. Holmes Nomencl. Petrol. 187 Poikiloblastic, a metamorphic texture due to the development, during recrystallisation, of a new mineral around numerous relics of the original minerals, thus simulating the poikilitic texture of igneous rocks. 1932 A. Harker Metamorphism xiii. 191 (caption) A large porphyroblast of green hornblende showing typical pœciloblastic or sieve-structure. 1990 Jrnl. Petrol. 31 638 The poikiloblastic garnets are either unzoned (As-84) or ‘normally’ zoned (As-79). 2003 Jrnl. Geochem. Explor. 80 41 A salient feature of the apatite is its poikiloblastic texture (with inclusions of quartz and iron oxides). This entry has been updated (OED Third Edition, September 2006; most recently modified version published online March 2022). < adj.1920
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