A supply

American  

noun

Electronics.

1. a battery or other source of power for heating the filament or cathode heater of an electron tube.

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Example Sentences

First, a supply chain warrants special focus when its disruption would quickly threaten lives, core defense missions or essential economic functions.

From The Wall Street Journal

While strong industrial appetite and a supply deficit — especially for silver — a weaker dollar, concerns about high government deficits, inflation and geopolitical worries have sparked a fever for those assets, Krauth said investors may not truly understand the supply/demand imbalance.

From MarketWatch

They resolved to look into arranging a supply of Zepbound for Lukashenko’s personal use.

From The Wall Street Journal

The Jordanian authorities gave Siwar's family a supply of 12 cans of the hypoallergenic Neocate formula on their departure for Gaza.

From BBC

Eliot’s school library operates out of a supply closet.

From Los Angeles Times