Quizdle is a free daily biology word puzzle for IB Biology students (and anyone who loves science). Each day there is one hidden biology term. You have six guesses to find it. After every guess, each letter is colour-coded:
Stuck? You get a new hint after each wrong guess — the topic, the first and last letters, and the term's definition. Solve it to grow your streak, then share your score with friends. A brand-new word appears every day at midnight.
Every Quizdle word is a real term from the IB Biology (2025) syllabus, drawn from our question bank across the four themes: unity and diversity, form and function, interaction and interdependence, and continuity and change. It is a fun, low-pressure way to revise your biology vocabulary a little every day.