Some science dictionaries specifically written for kids include "Science Dictionary for Kids: The Essential Guide to Science Terms, Concepts, and Strategies" by Laurie Westphal, "Scholastic Science Dictionary" by Melvin A. Berger and "The American Heritage Children's Science Dictionary," published by Houghton Mifflin Harcourt. These science dictionaries all include illustrations.
"First Illustrated Science Dictionary" is a science dictionary written for very young children by Sarah Khan. It features a large format with detailed, oversized illustrations discussing a wide variety of science topics, including forces, light, sound and living things. It also has a section defining science. "Science Dictionary for Kids: The Essential Guide to Science Terms, Concepts, and Strategies" has a similar format but is written for kids in upper elementary school or middle school.