Now updated for CSW19. New words, if any, and new inflections of existing words, are shown in red.
| allomeric | of similar crystalline structure. |
| allomerism | similarity of crystalline structure in substances of different chemical composition. |
| allomerous | exhibiting allomerism, similarity of crystalline structure in substances of different chemical composition. |
| allomorph | any one of two or more distinct crystalline forms of the same substance. |
| allomorphic | of or like an allomorph. |
| allotrope | an allotropic form of a substance. |
| allotropism | the state of an element existing in more than one form. |
| allotropy | the property whereby certain elements may exist in more than one crystal structure. |
| anorthic | of crystals, triclinic, referable to three unequal oblique axes. |
| axonometry | the branch of crystallography concerned with measurement of the axes of crystals. |
| bimorph | a device consisting of two crystals cemented together. |
| bipyramid | a crystal formed of two pyramids base to base. |
| bisectrix | the bisector of the angle between the optic axes of a crystal. |
| brachyaxis | in crystallography, the shorter lateral axis. |
| brachydiagonal | in crystallography, the shorter lateral axis. |
| clinoaxis | in crystallography, the clinodiagonal. |
| clinodiagonal | in a monoclinic crystal, that lateral axis which is not perpendicular to the vertical axis. |
| crystalisable | able to be crystalised. |
| crystalisation | the process of forming a crystal. |
| crystalise | to form a crystal. |
| crystaliser | something that crystalises. |
| crystalizable | able to be crystalised. |
| crystalization | the process of crystalizing. |
| crystalize | to form a crystal. |
| crystalizer | something that crystalizes. |
| crystalline | strikingly clear or sparkling; (noun) a crystalline substance. |
| crystallinity | the quality of being crystalline. |
| crystallisable | able to be crystallised. |
| crystallisation | the process of crystallising. |
| crystallise | to form a crystal. |
| crystalliser | an agent that causes crystallisation. |
| crystallite | any of the minute rudimentary or imperfect crystals occurring in many glassy rocks. |
| crystallitic | of or like crystallite, any of the minute rudimentary or imperfect crystals occurring in many glassy rocks. |
| crystallizable | able to be crystallized. |
| crystallization | the act of crystallizing. |
| crystallize | to form a crystal. |
| crystallizer | an agent that causes crystallisation. |
| crystallography | a science that deals with the forms and structures of crystals. |
| crystalloid | a water-soluble crystal able to diffuse through semi-permeable membranes. |
| crystalloidal | of or like a crystalloid. |
| dendrite | a treelike crystalline aggregate or skeleton crystal. |
| dendritic | of or like a dendrite. |
| dendritical | of or like a dendrite. |
| diadochy | replacement of one element in a crystal by another. |
| enantiotropy | the existence in a substance of two crystal forms, one stable above, the other below, a transition temperature. |
| endomorphy | the state of being an endomorph, a crystal of one species inclosed within one of another, as one of rutile inclosed in quartz. |
| epitaxial | relating to epitaxy, the growth of a thin layer of crystals on another crystal so that they have the same structure. |
| epitaxially | (Adv.) EPITAXIAL, relating to epitaxy, the growth of a thin layer of crystals on another crystal. |
| epitaxic | relating to epitaxy, the growth of a thin layer of crystals on another crystal so that they have the same structure. |
| epitaxy | the growth of a thin layer of crystals on another crystal so that they have the same structure. |
| eutropy | the regular variation in crystalline form of a series of compounds. |
| hemicrystalline | consisting of crystals in a glassy or partly glassy groundmass. |
| hemihedral | of a crystal or crystal class, having half of the maximum number of faces or symmetry planes possible for a given crystal system. |
| hemihedry | a property of crystals of being hemihedral. |
| hemitrope | of a crystal, twinned; (noun) a twinned crystal. |
| hemitropism | the state of being a hemitrope, a twinned crystal. |
| idiomorphic | of well-crystallized minerals, having a characteristic shape. |
| idiomorphically | (Adv.) IDIOMORPHIC, of well-crystallized minerals, having a characteristic shape. |
| intersertal | having interstitial crystalline or glassy matter between feldspar laths. |
| interstitial | occurring in an interstice (noun) an extra atom in a crystal lattice, causing a defect |
| isomorph | a substance which is similar to another in crystalline form and composition. |
| leucitohedron | the cubic icositetrahedron, simulated by typical leucite crystals. |
| macrodiagonal | in crystallography, the longer lateral axis. |
| macrodome | a dome parallel to the longer lateral axis of an orthorhombic crystal. |
| macropinacoid | a crystalline pinacoid which runs parallel to the longer horizontal axis. |
| macropinakoid | in crystallography, a pinakoid and prism parallel to the macrodiagonal. |
| macroprism | in crystallography, a prism parallel to the macrodiagonal. |
| metamict | of or denoting the amorphous state of a substance that has lost its crystalline structure as a result of the radioactivity of uranium or thorium within it. |
| metamictisation | the process of becoming metamict. |
| metamictization | the process of becoming metamict. |
| monocrystal | a single crystal. |
| monocrystalline | of or like a monocrystal. |
| morphotropy | the effect on crystalline form of the addition or substitution of an element or radical. |
| noncrystalline | not crystalline. |
| orthoaxis | in crystallography, the orthodiagonal. |
| orthodiagonal | in a monoclinic crystal, that lateral axis which is perpendicular to the vertical axis. |
| orthopinakoid | in monoclinic crystals, a form consisting of two faces parallel to the orthodiagonal and the vertical axis. |
| paramorph | a pseudomorph formed by a change in molecular structure without change of chemical composition. |
| paramorphic | relating to a paramorph. |
| paramorphous | of or like a paramorph. |
| perimorph | a crystal of one species enclosing one of another species. |
| perimorphic | like a perimorph. |
| perimorphous | like a perimorph. |
| phenocryst | a larger crystal in a porphyritic rock. |
| pinacoid | a crystal face, or a crystallographic form consisting of a pair of faces, parallel to two axes. |
| pinacoidal | denoting a type of crystal face. |
| pinakoid | a crystal form consisting of two (or more) parallel planes or faces. |
| pinakoidal | dentoing a type of crystal face. |
| poikilitic | mottled; having small crystals of one mineral irregularly scattered in larger crystals of another. |
| polycrystal | an object composed of several or many variously orientated crystals. |
| polycrystalline | consisting of crystals variously oriented. |
| polymorph | a substance capable of crystallizing in several distinct forms called allomorphs. |
| polymorphism | the circumstance in which two minerals with different crystalline structures have identical chemical compositions, eg diamond and graphite. |
| pseudosymmetry | a deceptively close approach by a crystal to a higher degree of symmetry. |
| pyroelectricity | electric charge produced in some crystals by temperature changes. |
| quasicrystal | a body of solid material that resembles a crystal in being composed of repeating structural units but that incorporates two or more unit cells into a quasiperiodic structure. |
| recrystallise | to crystallise again. |
| recrystallize | to crystallize again. |
| semicrystallic | having, or being, a partly crystalline structure. |
| semicrystalline | incompletely or imperfectly crystalline. |
| sphaerocrystal | a rounded crystalline mass. |
| stauroscope | an instrument for studying the structure of crystals with polarised light. |
| stauroscopic | of or like a stauroscope, an instrument for studying the structure of crystals with polarised light. |
| trapezohedron | a crystalline form whose faces are trapeziums. |
| trichroism | the quality possessed by some crystals of presenting different colors in three different directions. |
| triclinic | of crystals, having, or characterized by, three unequal axes intersecting at oblique angles. |
| trimorph | a substance which crystallizes in three distinct forms, or which has three distinct physical states. |
| trimorphism | the property of crystallizing in three forms. |
| uncrystallised | not crystallised. |
| uncrystallized | not crystallized. |
| xenocryst | a crystal or mineral grain which has been taken in by magma during its upward flow. |