单词	ductless
释义	ductless /ˈdʌktləs / adjective Anatomy Denoting a gland that secretes directly into the bloodstream, such as an endocrine gland or a lymph gland.Endocrine glands by contrast are ductless, and secrete hormones directly into the bloodstream.... These cellular masses, designated as the ductless glands or glands of internal secretion, have during development lost their original connection with the epithelium of the free surface. Today's hype about genetic enhancement, cloning, and stem cells was preceded by a much earlier hype about hormones, secretions, and ductless glands.
随便看	single file single-foot single-handed single-handedly single-hander single-lens reflex single malt single malt whisky single market single-minded single-mindedly single-mindedness singleness single nucleotide polymorphism single parent single-party single-player single room singles bar single-seater single-serving site single-source single stick singlet singleton

英语词典包含243303条英英释义在线翻译词条，基本涵盖了全部常用单词的英英翻译及用法，是英语学习的有利工具。