ductless ['dʌklis]

以下由轻松背单词网站提供

附加级

adj.无输送管的

Endocrinology is defined as the study of the ductless or endocrine glands and their internal secretions. 内分泌学的定义是：研究无管腺或称内分泌腺及它们的内分泌的科学。