Definition of "perspicuous" [per•spic•u•ous]

• Clearly expressed or presented; easy to understand: perspicuous prose. (adjective)
• Expressing oneself clearly and effectively: a perspicuous lecturer. (adjective)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "Similarly, to some numerical and geometrical functions, that can be described and grasped easily, the combinators that are frequently encountered can be characterized as perspicuous transformations on terms."
• "Proofs should be "perspicuous," that is, the structure and flow of the proof's ideas should be graspable in large measure, and the over-arching ideas should be strung together with a series of lemmas to make the proof easy to follow in broad and detailed examination."
• "The doctrine can, of course, expand even further to become a general principle of effective rhetoric or even of scientific language, where it appears under the rubric of clear, "perspicuous" representation, modeled on perspectival, rationally constructed imagery."