- logosA form of rhetoric in which the writer or speaker uses logical argument as the main form of persuasion.
- sociologyA social science that studies society, human social interaction, patterns of social relationships, and the interactions of culture. Through both theory and applied research, it engages subject matters across a range of microanalysis, mesoanalysis, and macroanalysis.
- logarithmFor a number x, the exponent by which a given base number must be raised in order to obtain the power x. Written log _bx. For example, log ₁₀1000=3 because 10³=1000 and log ₂16=4 because 2⁴=16.
- castellologyThe study of castles.
- collogueTo coax (someone); also, to flatter (someone).
- duologyA series comprising two parts, particularly in genre fiction.
- logo-word; speech.
- logodaedalyCleverness or skill in the coining of new words.
- logogriphA kind of puzzle where a series of verses give clues leading to a particular word.
- logopedicsThe study, and correction, of speech and language defects, disorders in communication and swallowing disorders.
- logopoeiaOne of Ezra Pound's three kinds of poetry, consisting of the use of words for more than their denotation, taking advantage of the context associated with a word.
- logorrheaExcessive talkativeness.
- paleologismA word or phrase that was coined in the distant past, often now obscured or offensive, or if recently used: possibly having a definition or implication different from that of any earlier usage.
- prelogismA word that has more recognition than a protologism but less recognition than a neologism.