Lecture

A lecture is an oral presentation intended to convey information or teach people about a particular subject. Lectures are often given, for example, by university or college teachers.

A group of lectures can make up a course, specifically a lecture course. According to Wikipedia, there are various types of courses, and lecture course is one type of course.

Wikipedia

 * Course (education) - this Wikipedia article specifically mentions lectures and how they relate to courses.

External

 * Lecturing Effectively