给概念下定义不是目的,仅仅是一种教学手段,它是学生深入系统学习知识的需要;是运用知识、防止化学概念遗忘的需要。对概念下定义的教学过程,也是培养学生能力的重要途径。中等医用化学教材更换频繁,定义使用比较随意,在教学中均以教材中出现的定义,进行实例分析,阐明对概念的理解和对定义要求,与同行磋商。 Defining concepts is not an end but a teaching method. It is the need of students to study systematically and in-depth. It is the need of using knowledge to prevent the forgetting of chemical concepts. The concept of the definition of the teaching process, but also an important way to develop students’ abilities. Secondary medical chemistry textbooks replaced frequently, the definition of the use of more casual, in teaching are defined in the textbooks, case studies, to clarify the understanding of the concept and the definition of requirements, and peer consultation.