顎がっ下か腺せん

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Meanings

1

submandibular gland; submaxillary gland

Anatomical term for one of the major salivary glands located beneath the lower jaw.

顎がっ下か腺せんは唾だ液えきを分ぶん泌ぴつする器き官かんの一ひとつです。
The submandibular gland is one of the organs that secrete saliva.