Fromz(“zepto”) +‎lm(“lumen”).

zlm

1. (metrology)Symbol forzeptolumen, anSI unit ofluminous flux equal to 10⁻²¹lumens.

Abbreviation ofEnglishMalay orMalayMelayu withz as a placeholder.

zlm

1. (international standards)ISO 639-3language code forMalay (individual language).

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