[{"word":"sentinels","phonetics":[],"meanings":[{"partOfSpeech":"noun","definitions":[{"definition":"A sentry, watch, or guard.","synonyms":[],"antonyms":[]},{"definition":"A private soldier.","synonyms":[],"antonyms":[]},{"definition":"A unique string of characters recognised by a computer program for processing in a special way; a keyword.","synonyms":[],"antonyms":[],"example":"The  tag is a sentinel that suspends web-page processing and displays the subsequent text literally."},{"definition":"A sentinel crab.","synonyms":[],"antonyms":[]},{"definition":"A sign of a health risk (e.g. a disease, an adverse effect).","synonyms":[],"antonyms":[],"example":"sentinel animals can be used to explore endemic diseases."}],"synonyms":[],"antonyms":[]}],"license":{"name":"CC BY-SA 3.0","url":"https://creativecommons.org/licenses/by-sa/3.0"},"sourceUrls":["https://en.wiktionary.org/wiki/sentinel","https://en.wiktionary.org/wiki/sentinels"]}]