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| tiny air sacs in the lungs |
| any of several glands, as the salivary glands, that secrete externally through a duct |
duct (dŭkt)
n.
A tubular bodily canal or passage, especially one for carrying a glandular secretion such as bile.
| duct (dŭkt) Pronunciation Key
A tube or tubelike structure through which something flows, especially a tube in the body for carrying a fluid secreted that is by a gland. |