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Definition of ductless
ductless
/ˈdʌkt.ləs/
duct · less
ductless Lexical Profile
CEFR
C1
Grade
10
Tier
2
Usage
Rare
Syllables
2
ductless Game Scores & Validity
Scrabble US
Scrabble UK
WWF
Wordle Guess
• adjective
1
Operating without a network of air ducts or external venting pipes (especially of heating, ventilation, or air-conditioning systems).
Example
"The homeowners installed a ductless air conditioner to cool the upstairs bedrooms efficiently."
2
Having no ducts; specifically (of an anatomical gland) secreting hormones directly into the bloodstream rather than through a duct.
Example
"The thyroid and pituitary are major ductless glands that regulate human metabolism and growth."
Synonyms
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View all antonyms for ductlessCite this Entry
Wordmom. (2026). Definition of Ductless. In Wordmom Dictionary. Retrieved Nov 5, 2026, from https://wordmom.com/dictionary/ductless