† microfelsiten.
Geology. Obsolete. rare.
A microfelsitic rock.
ΚΠ
1888 J. J. H. Teall Brit. Petrogr. 439 Microfelsite, a term first introduced by Zirkel,..is now generally defined as a microscopic substance, forming the base of some porphyries, which is characterized by the possession of a granular, scaly, and fibrous structure without the power of exerting any definite action on polarized light.
1892 Amer. Naturalist 26 162 Microfelsite is in many cases but a microscopic intergrowth of feldspars..and quartz.
1892 Amer. Naturalist 26 162 Cross places emphasis on the valuelessness of the term microfelsite in petrographical nomenclature, as he finds the material to be an aggregate of quartz and orthoclase.., and not the ill-defined substance described by Rosenbusch.
This entry has been updated (OED Third Edition, December 2001; most recently modified version published online June 2018).
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n.1888- for the shits and giggles
- for the shits and grins
- for the soul of me
- for the state of
- for the taking
- for the time
- for the time being
- for the time during
- for the use of
- for the very nonce
- for the want of
- for the want of a nail
- for the want of prosecution
- for the wealth of one's soul
- for the wealth of soul
- for the well of
- for the whistling
- for the worse
- for thee
- for this
- for this intent
- for this present
- for three lives
- for till
- for time