A young or juvenile doe, or the offspring of a female deer.
Compound of 'doe' (female deer) plus the diminutive suffix '-ling' (meaning young or small version of something). Common in English naturalist and hunting terminology.
English speakers love adding '-ling' to make cute baby versions of animals—we have ducklings, goslings, and doegling, which is the rarely-heard term for a baby girl deer.
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