| tip of tooth root | The tip of a tooth root, the part farthest from the incisal or occlusal side. Synonym: apex radicis dentis, root apex, root tip. (05 Mar 2000) |
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| tip-up | <zoology> The spotted sandpiper. Synonym: teeter-tail. See Sandpiper. Source: Websters Dictionary (01 Mar 1998) |