In poetry, a stanza is a division of four or more lines having a fixed length, meter or rhyming scheme. Stanzas in poetry are similar to paragraphs in prose. Both stanzas and paragraphs include connected thoughts and are set off by a space. The number of lines varies in different kinds of stanzas but it is uncommon for a stanza to have more than twelve lines. The pattern of a stanza is determined by the number of feet in each line and by its metrical or rhyming scheme.
BIOLOGICAL TOXINS. Toxins are defined as any toxic substance of natural origin produced by an animal, plant, or microbe. They are different from chemical agents such as VX, cyanide, or mustard in that they are not man-made.
1. toxin-a poisonous substance produced during the metabolism and growth of certain microorganisms and some higher plant and animal species. ricin, ricin toxin-a toxic protein extracted from castor beans; used as a chemical reagent; can be used as a bioweapon; one milligram of ricin can kill an adult.. toxin-a poisonous substance produced during the metabolism and growth of certain microorganisms and some higher plant and animal species. ricin, ricin toxin-a toxic protein extracted from castor beans; used as a chemical reagent; can be used as a bioweapon; one milligram of ricin can kill an adult.