an·or·tho·clase 
(ăn-ôrthə-klās′)
(ăn-ôrthə-klās′)n.
A white to colorless triclinic mineral of the alkali feldspar group that contains a higher proportion of sodium than potassium and is a common constituent in the matrices of slightly alkaline volcanic rocks.
[Greek an-, not; see A-1 + orthos, straight + klasis, a breaking (from its having two planes of cleavage intersecting at a slightly oblique angle); see ORTHOCLASE.]
- Indo-European root: dheigh-
- Indo-European root: dher-
- Indo-European root: dhers-
- Indo-European root: dheu-
- Indo-European root: dheu-
- Indo-European root: dheub-
- Indo-European root: dheugh-
- Indo-European root: dheuə-
- Indo-European root: dhghem-
- Indo-European root: dhgh(y)es-
- Indo-European root: dhreg-
- Indo-European root: dhreibh-
- Indo-European root: dhreu-
- Indo-European root: dhugəter-
- Indo-European root: dhwer-
- Indo-European root: dhē-
- Indo-European root: dhē(i)-
- Indo-European root: dhēs-
- Indo-European root: dhīgw-
- Indo-European root: dlegh-
- Indo-European root: dn̥ghū-
- Indo-European root: dus-
- Indo-European root: dwo-
- Indo-European root: dyeu-
- Indo-European root: dā-