ˌtərəˈtelə noun
Etymology: New Latin, irregular from Latin turris + New Latin -ella
1. capitalized : a genus (the type of the family Turritellidae) of marine gastropod mollusks having an elongated turreted shell composed of many whorls with a rounded aperture and a horny multispiral operculum
2. also tur·ri·tel·lid -lə̇d -s : any mollusk or shell of the genus Turritella or family Turritellidae — see screw shell