peritectoidadj.

Brit.

/ˌpɛrᵻˈtɛktɔɪd/, U.S.

/ˌpɛrəˈtɛktɔɪd/

Origin: Formed within English, by derivation. Etymons: peritectic adj., -oid suffix.

Etymology: < peritect- (in peritectic adj.) + -oid suffix, after eutectoid adj.

Science.

Of, relating to, or designating a reaction analogous to a peritectic reaction but involving three solid phases.

ΘΚΠ

the world > matter > chemistry > physical chemistry > phases > [adjective] > peritectic point

peritectic1924

peritectoid1936

1936 H. L. Alling Interpretative Petrol. Igneous Rocks viii. 97 The diagram shows that hedenbergite, CaFeSi₂O₆ on heating dissociates before reaching the solidus, forming a solid solution. I suggest this may be called a ‘peritectoid’ reaction.

1967 A. H. Cottrell Introd. Metall. xv. 235 Eutectoid and peritectoid changes occur in the solid state which are the exact analogues of the eutectic and peritectic forms of the liquid–solid change.

2003 Internat. Jrnl. Refractory Metals & Hard Materials 21 125 The intermetallic phase was formed by the peritectoid reaction between the Ni based matrix phase and the W-Mo grains.

Derivatives

peritecˈtoidally adv. by a peritectoid reaction.

ΚΠ

1961 Progress Nucl. Energy 3 56 The diagram up to URh resembles the uranium ruthenium diagram except that the phase U₂Rh forms peritectoidally rather than peritectically.

2002 Jrnl. Phase Equilibria 23 480 FeZr₃ decomposes peritectoidally at 851 degrees C.

This entry has been updated (OED Third Edition, December 2005; most recently modified version published online March 2022).

单词	peritectoid
释义	peritectoidadj. Brit. /ˌpɛrᵻˈtɛktɔɪd/, U.S. /ˌpɛrəˈtɛktɔɪd/ Origin: Formed within English, by derivation. Etymons: peritectic adj., -oid suffix. Etymology: < peritect- (in peritectic adj.) + -oid suffix, after eutectoid adj. Science. Of, relating to, or designating a reaction analogous to a peritectic reaction but involving three solid phases. ΘΚΠ the world > matter > chemistry > physical chemistry > phases > [adjective] > peritectic point peritectic1924 peritectoid1936 1936 H. L. Alling Interpretative Petrol. Igneous Rocks viii. 97 The diagram shows that hedenbergite, CaFeSi₂O₆ on heating dissociates before reaching the solidus, forming a solid solution. I suggest this may be called a ‘peritectoid’ reaction. 1967 A. H. Cottrell Introd. Metall. xv. 235 Eutectoid and peritectoid changes occur in the solid state which are the exact analogues of the eutectic and peritectic forms of the liquid–solid change. 2003 Internat. Jrnl. Refractory Metals & Hard Materials 21 125 The intermetallic phase was formed by the peritectoid reaction between the Ni based matrix phase and the W-Mo grains. Derivatives peritecˈtoidally adv. by a peritectoid reaction. ΚΠ 1961 Progress Nucl. Energy 3 56 The diagram up to URh resembles the uranium ruthenium diagram except that the phase U₂Rh forms peritectoidally rather than peritectically. 2002 Jrnl. Phase Equilibria 23 480 FeZr₃ decomposes peritectoidally at 851 degrees C. This entry has been updated (OED Third Edition, December 2005; most recently modified version published online March 2022). < adj.1936
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