Definition of allotropy in English:

allotropy

noun əˈlɒtrəpiəˈlätrəpē

mass nounChemistry

The existence of two or more different physical forms of a chemical element.
Example sentencesExamples
- The best known example for allotropy is iron.
- With the exception of nitrogen, all group V elements show allotropy.
- The difference in the arrangement of space in the atoms that make up the structure of an element is called allotropy.
- An example of allotropy is carbon, which can exist as diamond, graphite, and amorphous carbon.

Derivatives

allotropic

adjective aləˈtrɒpɪkˌæləˈtrɑpɪk

Chemistry

Graphite is one of the four allotropic forms of carbon; the other three are amorphous carbon, diamond, and fullerene.
Example sentencesExamples
- Synthetic diamonds are produced by forcing an allotropic transition from graphite to diamond under conditions of extremely high temperature and mechanical pressure over a period of several days or weeks.
- Manganese exists in four allotropic forms, the most common of which is stable to a temperature of about 1,300°F.
- As its two allotropic forms might suggest, silicon is a metalloid.
- Sulfur exists in three allotropic forms, two of which are yellow crystalline solids, and the third of which is an amorphous thick, brown, plastic liquid.

Origin

Mid 19th century: from Greek allotropos 'of another form', from allo- 'other' + tropos 'manner' (from trepein 'to turn').

Definition of allotropy in US English:

allotropy

nounəˈlätrəpē

Chemistry

The existence of two or more different physical forms of a chemical element.
Example sentencesExamples
- The best known example for allotropy is iron.
- The difference in the arrangement of space in the atoms that make up the structure of an element is called allotropy.
- With the exception of nitrogen, all group V elements show allotropy.
- An example of allotropy is carbon, which can exist as diamond, graphite, and amorphous carbon.

Origin

Mid 19th century: from Greek allotropos ‘of another form’, from allo- ‘other’ + tropos ‘manner’ (from trepein ‘to turn’).

单词	allotropy
释义	Definition of allotropy in English: allotropy noun əˈlɒtrəpiəˈlätrəpē mass nounChemistry The existence of two or more different physical forms of a chemical element. Example sentencesExamples The best known example for allotropy is iron. With the exception of nitrogen, all group V elements show allotropy. The difference in the arrangement of space in the atoms that make up the structure of an element is called allotropy. An example of allotropy is carbon, which can exist as diamond, graphite, and amorphous carbon. Derivatives allotropic adjective aləˈtrɒpɪkˌæləˈtrɑpɪk Chemistry Graphite is one of the four allotropic forms of carbon; the other three are amorphous carbon, diamond, and fullerene. Example sentencesExamples Synthetic diamonds are produced by forcing an allotropic transition from graphite to diamond under conditions of extremely high temperature and mechanical pressure over a period of several days or weeks. Manganese exists in four allotropic forms, the most common of which is stable to a temperature of about 1,300°F. As its two allotropic forms might suggest, silicon is a metalloid. Sulfur exists in three allotropic forms, two of which are yellow crystalline solids, and the third of which is an amorphous thick, brown, plastic liquid. Origin Mid 19th century: from Greek allotropos 'of another form', from allo- 'other' + tropos 'manner' (from trepein 'to turn'). Definition of allotropy in US English: allotropy nounəˈlätrəpē Chemistry The existence of two or more different physical forms of a chemical element. Example sentencesExamples The best known example for allotropy is iron. The difference in the arrangement of space in the atoms that make up the structure of an element is called allotropy. With the exception of nitrogen, all group V elements show allotropy. An example of allotropy is carbon, which can exist as diamond, graphite, and amorphous carbon. Origin Mid 19th century: from Greek allotropos ‘of another form’, from allo- ‘other’ + tropos ‘manner’ (from trepein ‘to turn’).
随便看	ovism ovist ovi-viviparity ovi-viviparous ovivorous ovo- ovoalbumin ovocyte ovogenesis ovogenetic ovoglobulin ovogonial ovoid ovoidal ovoids ovoli ovolo ovology ovomucin ovomucoid ovonic ovonics ovoplasm ovotestes ovotesticular