This document provides vocabulary definitions to accompany a reading selection about trees. It includes definitions for 12 words: solid, limbs, sprouts, extremely, release, trunks, stems, minerals, oxygen, substance, growth, and seedling. The definitions are presented to help students understand the meaning of words they will encounter in the story. The concept word for the lesson is "growth," which is defined as "the process of becoming larger." Trees need sun, food, water, and minerals to grow and become larger living things.