| A | B |
| entomology | Study of insects. |
| Arthropoda | Insect Phylum which means "jointed feet" |
| Insecta | Class of Animalia for insects |
| Head, thorax and abdomen | Three main body parts of an insect |
| exoskeleton | The outer hard shell covering of insects |
| Molting | When an insect sheds its old exoskeleton. |
| cast | Insects molted exoskeleton |
| Compound Eye | Eye of insect composed of many small individual lenses, each producing an image |
| Ocelli | The simple eye of an insect that only detects light and dark |
| antennae | Two structures coming out from between the compound insect eye; they have sensory hairlike setae |
| pheromones | Chemicals that travel through the air that communicate messages |
| mandibles | Cutting portion of a chewing mouth |
| palps | Used to touch/taste before insect eats the food. |
| halters | Wing-like structures used for balance; not true wings |
| membranous wings | Wings composed of reinforcing veins. |
| scaled wings | Wings composed of powdery-like scales |
| spiracles | Small holes in insect abdomen where air enters for oxygen supply |
| trachea | The tube which spiracles attach to for insect oxygen supply |
| passive breathing | inefficient breathing of insect where both oxygen and waste gases travel |
| ovipositor | The structure found on some female insects used to lay their eggs |