[{"word":"annulus","phonetics":[],"meanings":[{"partOfSpeech":"noun","definitions":[{"definition":"A ring- or donut-shaped area or structure.","synonyms":[],"antonyms":[]},{"definition":"The region in a plane between two concentric circles of different radii.","synonyms":[],"antonyms":[]},{"definition":"Any topological space homeomorphic to the region in a plane between two concentric circles of different radius.","synonyms":[],"antonyms":[]},{"definition":"The ring of the sun not covered by the moon in an annular solar eclipse.","synonyms":[],"antonyms":[]},{"definition":"Structure in a fern that consists of differentially thick-walled cells on a sporangium that bend and distort as a result of drying.","synonyms":[],"antonyms":[]},{"definition":"The membranous remnants of a partial veil which leaves a ring on the stem of a mushroom.","synonyms":[],"antonyms":[]},{"definition":"(oil and gas production) The space contained between the centre well bore and any external tubing. Sometimes used for separated gas flow.","synonyms":[],"antonyms":[]}],"synonyms":["cylinder"],"antonyms":[]}],"license":{"name":"CC BY-SA 3.0","url":"https://creativecommons.org/licenses/by-sa/3.0"},"sourceUrls":["https://en.wiktionary.org/wiki/annulus"]}]