| lateral bicipital groove | at the cubital fossa, the groove separating the biceps brachii and brachialis muscles on the lateral side. Synonym: sulcus bicipitalis lateralis. (05 Mar 2000) |
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| linguogingival groove | A groove separating the embryonic mandibular portion of the tongue from the remainder of the mandibular process. (05 Mar 2000) |
| Lucas' groove | A faint groove occasionally caused by the chorda tympani nerve on the spine of the sphenoid. Synonym: Lucas' groove, sulcus spinosus. (05 Mar 2000) |