A passage through which air can penetrate; (Botany) a continuous airspace in the stem, petiole, root, etc., of an aquatic or semiaquatic plant.
Mid 18th century.
英汉双解词典包含464360条英汉词条，基本涵盖了全部常用单词的翻译及用法，是英语学习的有利工具。