1. the basic principles or elements of a subject; fundamental skills or knowledge
Usage: usually plural
2. an undeveloped or imperfectly developed part or organ
Usage: biology; formal

Examples

• She learned the rudiments of piano playing from her grandmother.
• The course covers the rudiments of computer programming.
• He mastered the rudiments of cooking before attempting complex recipes.
• Students must understand the rudiments of grammar before writing essays.
• The rudiments of good manners should be taught early.
• Scientists studied the rudiments of wings in flightless birds.