How Do You Use "serendipitous" in a Sentence?

A sentence using the word "serendipitous" is: "Sir Alexander Fleming's discovery of penicillin began with a serendipitous observation." Another sentence is "The serendipitous weather was perfect for a picnic in the park." "Serendipitous" is the adjective form of the word "serendipity."

"Serendipitous" describes something found by accident or by chance and proves to be beneficial as in "a happy accident." It is also defined as an adjective meaning "good," "favorable" or "unexpected luck." Many scientific discoveries have been described as "serendipitous." In addition to Sir Fleming's discovery of penicillin, Percy Spencer's discovery of microwaves and Wilhelm Röntgen's discovery of x-rays have both be called "serendipitous."

The adjective "serendipitous" was first used sometime between 1940 and 1945. The noun, "serendipity," was first coined in 1754. Horace Walpole used it in a letter to Horace Mann; he created it from the Persian folktale "The Three Princes of Serendip." Serendip is a former name for Sri Lanka. It comes form the Arabic word "Sarandib," from the Sanskrit word "Simhaladvipa."

Synonyms, or words that have a similar meaning, for "serendipitous" include "spontaneous," "improvised," "fortuitous," "unexpected" and "accidental." Antonyms, or words that have the opposite meaning, for "serendipitous" include "intentional," "deliberate," "premeditated," "designed" and "calculated."