ductless

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ductless

 [dukt´les]
having no excretory duct.

duct·less

(dŭkt'les),
Having no duct; denoting endocrine glands having only an internal secretion.

duct·less

(dŭkt'lĕs)
Having no duct; denoting certain glands having only an internal secretion.

ductless

having no excretory duct.

ductless glands
the endocrine glands.