Related:

• glassfet: /glas'fet/ [by analogy with MOSFET, the acronym for `Metal-Oxide-Semiconductor Field-Effect Transistor'] n.
  Syn. {firebottle}, a humorous way to refer to a vacuum tube. -- The AI Hackers Dictionary...
• firebottle: n. A large, primitive, power-hungry active electrical device, similar in function to a FET but constructed out of glass, metal, and vacuum.
  Characterized by high cost, low density, low reliability, high-temperature operation, and high power dissipation....
• firebottle n.obs. A large, primitive, power-hungry active electrical device, similar in function to a FET but constructed out of glass, metal, and vacuum.
  Characterized by high cost, low density, low reliability, high-temperature operation, and high power dissipation....
• heavy metal n. [Cambridge] Syn. big iron.
• heavy metal: [Cambridge] n. Syn. {big iron}. -- The AI Hackers Dictionary
• A vacuum-tube brain in a microchip world.
• Bubble Memory, n.: A derogatory term, usually referring to a person's intelligence.
  See also "vacuum tube"....