anhedral


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anhedral

[an′hēd·rəl]
(mineralogy)

anhedral

anhedral
The negative angle between the lateral axis of an airplane and a line passing through the center of a wing or horizontal stabilizer. Also referred to as negative dihedral.
References in periodicals archive ?
Deanesmithite is generally associated with edoylerite and anhedral crystalline masses and powdery coatings of cinnabar.
of diopside (En 43-48) and anhedral granoblasts of olivine are embedded in a partially to completely serpertinised groundmass.
General appearance: Anhedral grains (up to 0.5 mm) across in aggregates several mm wide.
Euhedral to subhedral plagioclase and subhedral to anhedral augite with minor olivine and hornblende are arranged in subpoikilitic manner (Fig.
The groundmass is largely intergranular with ferromagnesian microlites occupying interstices between subhedral to anhedral plagioclase laths (Fig 3a).
Bed C is mainly composed of anhedral rhomb-shaped dolomite crystals with rare quartz grains and molluscan fragments.
Careful examination may reveal more occurrences of diopside, but I recall only small subhedral to anhedral grains of what appears to be diopside associated with small hercynite octahedrons and clintonite rosettes near the summit.
The calcite cements, which are composed mostly of anhedral calcite crystals (Figure 9(a)), represent a poikilotopic texture and local replacement of framework grains (Figures 6(f) and 6(g)).
Olivine occurs in nearly ail cumulates as sub- to anhedral grains, and is partly altered to serpentine or iddingsite.
General appearance: Anhedral grains in aggregates up to 0.02 mm across.