blastoderm: the germinal membrane from which the organs of the embryo are formed. Explanation of Terms Used in Entomology John. B. Smith He it was who introduced the terms Keimhaut (blastoderm) and Keimblatt (germ-layer).
Child Study. Child study, also called paidology or experimental pedagogy, was the attempt to apply the methods of modern science to the investigation of children in order to discover the laws of normal child development.
Definition of study for English Language Learners. : 1  the activity or process of learning about something by reading, memorizing facts, attending school, etc. : 2  an area of learning taught in a school. : 3  something that a person studies or gives attention to.