Leaving Certificate Biology – Key Terms, Definitions & Concepts (OL & HL)

This 40-page Biology Key Terms & Concepts Dictionary is written specifically for the pre-2025 Leaving Certificate Biology course (old specification).

It provides clear, exam-appropriate definitions of the key biological terms and concepts that students are expected to know, understand, and use accurately in Higher Level and Ordinary Level exam questions.

Designed for students who:

struggle with scientific terminology

lose marks due to poor definitions

need a clear reference rather than long textbook explanations

✔ What’s Included:

Key Biology terms from the old LC Biology course

Clear, concise definitions in exam-friendly language

HL & OL content clearly accessible

Support for definitions, short questions, and long answers

Ideal for revision, exam prep, and in-class support

This resource cuts through the waffle and focuses only on what students actually need to know for the exam.

🎯 Who It’s For

Leaving Cert Biology students (HL & OL — old course)

Biology teachers supporting mixed-ability classes

Students revising for tests, mocks, or the Leaving Cert