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.
toxin. n. 1. (Pathology) any of various poisonous substances produced by microorganisms that stimulate the production of neutralizing substances (antitoxins) in the body. See also endotoxin, exotoxin. 2. (Biology) any other poisonous substance of plant or animal origin.. A poisonous substance, especially a protein, that is produced by living cells or organisms and is capable of causing disease when introduced into the body tissues but is often also capable of inducing neutralizing antibodies or antitoxins. 2. A poisonous or harmful nonbiological substance, such as a pollutant.