This glossary has been prepared to serve as a comprehensive guide for interpreting the current literature pertaining to plant cell and tissue culture. It is intended to supplement rather than supercede prior technical publications such as plant propagation by tissue culture (George and Sherrington, 1984) or handbook of plant cell culture [Evans et.al.,1993] and to complement to rather than replace the glossary in in vitro 20: 19-24 (Tissue culture association terminology committee,1984). The terms included in the glossary have been selected by examinations of text books, Journals and glossaries dealing entirely or in part with plant tissue culture or related fields. References consulted during preparation of the manuscript are listed under "Sources" on pp 139-141. Each entry is listed alphabetically, in bold faced type, at the point in the text where it is defined. The more common derivatives of a term are also given in bold faced type. Multi-sense entries are separated by numbers(1,2 etc.). Some common English terms which have particular meanings in plant tissue culture, such as "sterilize" are defined in the text. Commonly used chemicals are listed alphabetically by their chemical names followed by their abbreviation , chemical formulae and atomic and molecular weights.