1. (noun) a thermionic tube having two electrodes; used as a rectifier

• rectifying tube
• rectifying valve

2. (noun) a semiconductor that consists of a p-n junction

• crystal rectifier
• junction rectifier
• semiconductor diode

1. (noun) a thermionic tube having two electrodes; used as a rectifier

• electron tube
• thermionic tube
• thermionic vacuum tube
• thermionic valve
• tube
• vacuum tube

2. (noun) a semiconductor that consists of a p-n junction

• semiconductor
• semiconductor device
• semiconductor unit

1. (noun) a semiconductor that consists of a p-n junction

• led
• light-emitting diode