This work, "Glossary of Frequently Used Terms in Educational Research" presents definitions and short explanations of around seven hundred frequently used terms in educational research. The terms included here are mainly the terms that are frequently used in research methodology, statistical measurements, statistical procedures and terms that generally relate to educational research. An effort has been made to first identify those terms which are frequently used in contemporary educational research and then presented with simple possible explanations in alphabetical order. The work is composed as a reference book with the intention to assist those who are novices in the field of educational research.