| reactants definitions |
| # | Definition | Sets |
| 1 | the elements or compounds that enter into a chemical reaction | 69 sets |
| 2 | the starting materials in a chemical reaction | 27 sets |
| 3 | the substances that react in a chemical change | 19 sets |
| 4 | elements or compounds that enter into a chemical reaction | 14 sets |
| 5 | starting materials | 10 sets |
| 6 | substances that react in a chemical change | 10 sets |
| 7 | the substances that start a chemical reaction | 9 sets |
| 8 | starting material for a chemical reaction | 7 sets |
| 9 | starting substances | 7 sets |
| 10 | a substance that enters into a chemical reaction | 6 sets |
| 11 | the substances that react in a chemical reaction | 6 sets |
| 12 | substances that react | 6 sets |
| 13 | the starting materials for chemical reactions. | 5 sets |
| 14 | the starting substances in a chemical reaction | 5 sets |
| 15 | element or compound that enters into a chemical reaction | 5 sets |
| 16 | a starting substance in a chemical reaction | 5 sets |
| 17 | starting materials in a chemical reaction | 4 sets |
| 18 | any substances that go into a reaction | 4 sets |
| 19 | starting substances in a chemical reaction | 4 sets |
| 20 | the original substance before they are combined. | 4 sets |
| 21 | substances that enter into a chemical reaction | 4 sets |
| 22 | substances or molecules that participate in a chemical reaction | 3 sets |
| 23 | a substance that enters into and is altered in the course of a chemical reaction. | 3 sets |
| 24 | starting products | 3 sets |
| 25 | a substance or molecule that participates in a chemical reaction | 3 sets |
| 26 | a substance that enters into a chemical reaction. | 3 sets |
| 27 | the starting materials of a chemical reaction | 3 sets |
| 28 | the compounds that are needed for a chemical reaction to happen | 3 sets |
| 29 | chemicals that react together, left of the arrow | 3 sets |
| 30 | substances that participate in a reaction | 3 sets |
| 31 | the substances that exist before the reaction begins | 3 sets |
| 32 | a substance that undergoes change in a chemical reaction | 3 sets |
| 33 | a starting material in a chemical reaction | 3 sets |
| 34 | the substances that react during a reaction and are found to the and are found to the left of the arrow | 3 sets |
| 35 | a substance or molecule that participates in a chemical reaction. | 3 sets |
| 36 | substances before chemical reaction | 2 sets |
| 37 | starting material | 2 sets |
| 38 | substances that go into a reaction | 2 sets |
| 39 | ingredients that are on the left side of the yield arrow: | 2 sets |
| 40 | the starting substances of a chemical reaction; they appear on the left-hand side of a chemical equation | 2 sets |