| A | B |
| Egocentrism | Complete absorption with self |
| Object Permanence | Realization that objects exist when out of sight |
| Sensorimotor Stage | Piaget's first stage of cognitive development |
| Stranger anxiety | Distress resulting from the ability of distinguishing caregivers from others |
| Bottle-mouth caries | Severe tooth decay caused by bing put to bet with a bottle |
| Deciduous Teeth | "Baby" or first teeth |
| Pincher grasp | Ability to approximate the index finger and thumb to grasp objects |
| Attachment | Sense of belonging |
| Colic | Unexplained crying or fussiness |
| Weaning | Replacement of a breast or bottle feeding with a cup |