a substance (a virus or toxin or immune serum) that is introduced into the body to produce or increase immunity to a particular disease (noun.substance)
any of the more than 100 known substances (of which 92 occur naturally) that cannot be separated into simpler substances and that singly or in combina more..any of the more than 100 known substances (of which 92 occur naturally) that cannot be separated into simpler substances and that singly or in combination constitute all matter(noun.substance)
(biology) any agency bringing about activation; a molecule that increases the activity of an enzyme or a protein that increases the production of a ge more..(biology) any agency bringing about activation; a molecule that increases the activity of an enzyme or a protein that increases the production of a gene product in DNA transcription(noun.substance)
any substance possessing to a high degree the predominant properties of a plant or drug or other natural product from which it is extracted (noun.substance)
what a communication that is about something is about(noun.communication)
a message expressing a belief about something; the expression of a belief that is held with confidence but not substantiated by positive knowledge or more..a message expressing a belief about something; the expression of a belief that is held with confidence but not substantiated by positive knowledge or proof(noun.communication)
something (manuscripts or architectural plans and models or estimates or works of art of all genres etc.) submitted for the judgment of others (as in more..something (manuscripts or architectural plans and models or estimates or works of art of all genres etc.) submitted for the judgment of others (as in a competition)(noun.communication)
a message that tells the particulars of an act or occurrence or course of events; presented in writing or drama or cinema or as a radio or television more..a message that tells the particulars of an act or occurrence or course of events; presented in writing or drama or cinema or as a radio or television program(noun.communication)