Every word, made clear.
A plain-language glossary for anyone getting started in code. Every term gets one clear, friendly definition — no jargon to explain the jargon — in English, Simplified and Traditional Chinese. Look one up the moment it trips you.
Mathematics
Mathematics (12)Algebra (704)Geometry (705)Calculus (401)Linear Algebra (394)Mathematical Analysis (350)Complex Analysis (337)Ordinary Differential Equations (353)Partial Differential Equations (341)Probability Theory (674)Computational Mathematics (351)Data Science & Statistics (168)
Computer Science
Computing (92)Data Structures & Algorithms (52)Algorithm Design & Analysis (329)Systems Programming (785)Operating Systems (374)Computer Networks (360)Computer Architecture (356)Formal Languages & Automata (354)AI & Machine Learning (736)Large Language Models (350)Reinforcement Learning (350)Computer Vision (360)AI Safety & Alignment (99)Quantum Computing (48)Blockchain (348)
Physical Sciences
Physics (712)Relativity (55)Quantum Mechanics (300)Condensed Matter Physics (344)Particle Physics (331)Astrophysics (376)Astronomy (12)Earth & Climate (12)
Chemistry
Chemistry (12)Physical Chemistry (340)Analytical Chemistry (341)Organic Chemistry (335)Inorganic Chemistry (331)Medicinal Chemistry (340)
Life Sciences
Biology (12)Cell Biology (340)Molecular Biology (368)Genetics (341)Neuroscience (361)
Medicine & Health
Medicine (12)Cardiology (345)Pulmonology (345)Endocrinology (360)Pharmacology (360)Pharmaceutics (340)Regenerative Medicine (61)Rehabilitation Medicine (353)
Engineering
Electrical Engineering (452)Electronic Circuits (358)Robotics (306)Brain–Computer Interfaces (750)Quantum Chip Design (55)Materials Science (350)Materials Structure (353)Ceramic Materials (347)
Social Sciences
Economics (355)Psychology (12)Linguistics (12)
Humanities
Philosophy (12)History (12)Law (12)