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A (4+3) cycloaddition [1] is a cycloaddition between a four-atom π-system and a three-atom π-system to form a seven-membered ring. Allyl or oxyallyl cations (propenylium-2-olate) are commonly used three-atom π-systems, while a diene (such as butadiene) plays the role of the four-atom π-system.
Concerted evolution (phenomenon of duplicated genes) may often be caused by the genetic exchange known as gene conversion. [3] This other phenomenon is known as the "non-reciprocal exchange of genetic material between homologous sequences."
A child that has been concertedly cultivated will often express greater social prowess in social situations involving formality or structure attributed to their increased experience and engagement in organized clubs, sports, musical groups as well as increased experience with adults and power structure. This pattern of child rearing has been ...
Caesura: a stop or pause in a metrical line, typically marked by punctuation. [1] Canto: a long subsection of a long narrative poem such as an epic. [1] End rhyme (aka tail rhyme): a rhyme occurring in the terminating word or syllable of one line in a poem with that of another line, as opposed to internal rhyme. End-stopping line
Also amphidrome and tidal node. A geographical location where there is little or no tide, i.e. where the tidal amplitude is zero or nearly zero because the height of sea level does not change appreciably over time (meaning there is no high tide or low tide), and around which a tidal crest circulates once per tidal period (approximately every 12 hours). Tidal amplitude increases, though not ...
Stichomythia (Ancient Greek: στιχομυθία, romanized: stikhomuthía) is a technique in verse drama in which sequences of single alternating lines, or half-lines (hemistichomythia [1]) or two-line speeches (distichomythia [2]) are given to alternating characters. It typically features repetition and antithesis. [3]
An 1850 acrostic by Nathaniel Dearborn, the first letter of each line spelling the name "JENNY LIND". An acrostic is a poem or other word composition in which the first letter (or syllable, or word) of each new line (or paragraph, or other recurring feature in the text) spells out a word, message or the alphabet. [1]
The word "couplet" comes from the French word meaning "two pieces of iron riveted or hinged together". The term "couplet" was first used to describe successive lines of verse in Sir P. Sidney's Arcadia in 1590: "In singing some short coplets, whereto the one halfe beginning, the other halfe should answere."