Adjective: (Latin: perspicere, to see through) clear in a statement or expression; easily understood.
Adjective: intended as instructional. Noun: a book, speech, essay, etc., that is protreptic.
Adjective: substitute or synthetic, usually suggesting inferior quality.
Adjective: of the philosophy or the followers of Aristotle, who walked about in the Lyceum while he was teaching; (with a lower-case p) walking or moving about; not staying in one place; itinerant.
Noun: ten thousand square meters or one one-hundredth of a square kilometer, approximately equal to two-and-ahalf acres.
Pierre Guesnon is a retired engineer who founded and ran an engineering company in Boston for many years, until he retired fifteen years ago. Since then, he has lived most of each year on Marco Island. He is married to an Australian, Margaret Guesnon, whom he met in London and married in Sydney. They have two daughters. Pierre has had a lifelong interest in words and language.