Hypnosis is a state of human consciousness involving focused attention and reduced peripheral awareness and an enhanced capacity for response to suggestion. The term may also refer to an art, skill, or act of inducing hypnosis. Theories explaining what occurs during hypnosis fall into two groups. Altered state theories see hypnosis as an altered state of mind or trance, marked by a level of awareness different from the ordinary conscious state. In contrast, nonstate theories see hypnosis as a form of imaginative role-enactment.
tercet. n. 1. (Poetry) a group of three lines of verse that rhyme together or are connected by rhyme with adjacent groups of three lines. [C16: from French, from Italian terzetto, diminutive of terzo third, from Latin tertius ].
2-line stanzas. A 2-line stanza is called a couplet. aa is a rhymed couplet; xx an unrhymed couplet. The French call rhymed couplets rimes plates or rimes suivies. 3-line stanzas. A 3-line stanza of any kind is called a tercet. aaa is a triplet. axa is pretty common, occurring in forms such as the villanelle and terza rima (where in both cases there are also rhymes between stanzas). The haiku is a species of tercet, and so are some varieties of englyn (though not the one featured on this site).