kumquat
Refers to the small citrus fruit or the tree itself. The spelling 金柑 is standard; キンカン is common in shops and gardening.
I planted a kumquat tree in the garden.
Kumquats can be eaten with the peel on.
Katakana spelling, often used in botanical or commercial contexts.
Rarely used kanji form; 金柑 is preferred.
From Chinese 金橘 (jīn jú), literally 'golden orange'. The reading きんかん is the on'yomi of the kanji.