| acrylamide | (noun) a white crystalline amide of propenoic acid can damage the nervous system and is carcinogenic in laboratory animals | - |
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| acrylate | (noun) a salt or ester of propenoic acid | Synonyms: propenoate |
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| acrylic | (noun) a synthetic fabric made from polyacrylonitrile | - |
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| (noun) used especially by artists | Synonyms: acrylic paint |
| (noun) a glassy thermoplastic; can be cast and molded or used in coatings and adhesives | Synonyms: acrylate resin, acrylic resin |
| (noun) polymerized from acrylonitrile | Synonyms: acrylic fiber |
| acrylonitrile | (noun) a colorless liquid unsaturated nitrile made from propene | Synonyms: propenonitrile, vinyl cyanide |
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| dacryocyst | (noun) either of the two dilated ends of the lacrimal ducts at the nasal ends of the eyes that fill with tears secreted by the lacrimal glands | Synonyms: lacrimal sac, tear sac |
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| dacryocystitis | (noun) inflammation of the lacrimal sac causing obstruction of the tube draining tears into the nose | - |
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| dacryon | (noun) the craniometric point at the junction of the anterior border of the lacrimal bone with the frontal bone | - |
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