| No. | Term | Definition |
|---|---|---|
| 1. | anneal | Cool glass slowly to reduce stress. |
| 2. | aperture | Opening controlling light in optics. |
| 3. | argon fill | Inert gas used in insulated glazing. |
| 4. | art glass | Decorative glass made as artwork. |
| 5. | ashtray | Small dish, often glass, for ash. |
| 6. | baccarat | Luxury French crystal glass brand. |
| 7. | backlit glass | Glass illuminated from behind. |
| 8. | bead | Small decorative piece of glass. |
| 9. | beaker | Lab container, often heat-resistant glass. |
| 10. | bevel | Angled edge cut into glass. |
| 11. | blown glass | Glass shaped by blowing air. |
| 12. | borosilicate | Heat-resistant glass with low expansion. |
| 13. | bottle | Glass container for liquids. |
| 14. | bubbles | Air pockets trapped within glass. |
| 15. | carafe | Glass vessel for serving drinks. |
| 16. | casing | Layering one glass over another. |
| 17. | chandelier | Ceiling light fixture with glass parts. |
| 18. | clarity | Degree of transparency and purity. |
| 19. | cut crystal | Crystal glass with faceted cuts. |
| 20. | decanter | Glass vessel for aerating wine. |
| 21. | defrost lines | Heater wires on vehicle glass. |
| 22. | dichroic glass | Glass showing shifting colors. |
| 23. | diffuser | Glass that scatters light softly. |
| 24. | double glazing | Two panes separated for insulation. |
| 25. | drinking glass | Glass cup for beverages. |
| 26. | dropper | Glass tube for dispensing drops. |
| 27. | etched glass | Glass surface made matte by etching. |
| 28. | eyeglasses | Vision-correcting lenses in frames. |
| 29. | faceted | Cut into flat reflective faces. |
| 30. | faience glaze | Glassy coating on ceramics. |
| 31. | fibre glass | Glass fibers used in composites. |
| 32. | filigree | Delicate decorative glass threads. |
| 33. | float glass | Flat glass made on molten tin. |
| 34. | flute | Tall narrow glass for sparkling wine. |
| 35. | frosted | Matte finish that obscures view. |
| 36. | furnace | High-heat oven for melting glass. |
| 37. | gasket | Seal around glass in frames. |
| 38. | glare | Harsh light reflected from glass. |
| 39. | glassblowing | Forming glass with a blowpipe. |
| 40. | glazier | Person who installs or repairs glass. |
| 41. | glazing | Fitting glass into a frame. |
| 42. | goblet | Stemmed drinking vessel. |
| 43. | goggles | Protective eyewear with lenses. |
| 44. | greenhouse glass | Glazing used for plant houses. |
| 45. | hardened | Made stronger by heat treatment. |
| 46. | heat-strengthened | Moderately strengthened safety glass. |
| 47. | hourglass | Timekeeper using sand in glass bulbs. |
| 48. | hurricane glass | Candle shade protecting from wind. |
| 49. | insulated glass | Sealed unit improving thermal performance. |
| 50. | interlayer | Plastic layer in laminated glass. |
| 51. | iridescent | Showing rainbow-like surface colors. |
| 52. | jar | Wide-mouthed glass container. |
| 53. | jug | Handled vessel, often glass. |
| 54. | kiln | Oven used for fusing glass. |
| 55. | laminated glass | Bonded layers that hold when broken. |
| 56. | lens | Glass element that focuses light. |
| 57. | light prism | Glass that splits light into colors. |
| 58. | luster | Shiny appearance of glass surface. |
| 59. | marble (glass) | Small glass sphere used in games. |
| 60. | mirror | Reflective glass with metal backing. |
| 61. | mold | Form used to shape molten glass. |
| 62. | mosaic | Pattern made from small glass pieces. |
| 63. | mug | Handled drinking cup, sometimes glass. |
| 64. | mullion | Vertical bar between window panes. |
| 65. | neodymium glass | Glass tinted by neodymium oxide. |
| 66. | nickel sulfide | Inclusion causing spontaneous glass breakage. |
| 67. | nuclear glass | Vitrified material from high heat. |
| 68. | obsidian | Naturally occurring volcanic glass. |
| 69. | oculus | Round window opening, often glazed. |
| 70. | opal glass | Milky translucent decorative glass. |
| 71. | optical glass | High-quality glass for lenses. |
| 72. | pane | Single sheet of window glass. |
| 73. | pattern glass | Textured glass with embossed design. |
| 74. | photogray | Light-sensitive darkening lens material. |
| 75. | plate glass | Thick flat glass sheet. |
| 76. | polycarbonate glazing | Plastic alternative to glass panels. |
| 77. | pyrex | Brand associated with borosilicate glass. |
| 78. | quartz glass | Fused silica with very high purity. |
| 79. | reflective coating | Thin film reducing glare or heat. |
| 80. | refractive index | Measure of how glass bends light. |
| 81. | resin fill | Repair method for chipped glass. |
| 82. | rim | Top edge of a glass vessel. |
| 83. | safety glass | Glass designed to reduce injury. |
| 84. | sand | Silica source for making glass. |
| 85. | scratch | Surface mark from abrasion. |
| 86. | sealed unit | Factory-made insulated glazing assembly. |
| 87. | shard | Broken piece of glass. |
| 88. | shatter | Break into many sharp fragments. |
| 89. | sheet glass | Flat glass made in sheets. |
| 90. | silica | Primary component of most glass. |
| 91. | skylight | Roof window made with glazing. |
| 92. | slump | Sagging glass shaped by heat. |
| 93. | smalti | Opaque colored glass for mosaics. |
| 94. | soda-lime glass | Common glass made with soda and lime. |
| 95. | stained glass | Colored glass arranged in designs. |
| 96. | stemware | Drinking glasses with stems. |
| 97. | stopper | Plug closing a bottle or decanter. |
| 98. | tempered glass | Heat-treated glass that crumbles safely. |
| 99. | tint | Added color reducing light transmission. |
| 100. | transom | Window above a door or another window. |

