| lateral crus of horizontal part of the facial canal | Laterally-placed, posteriorly-directed second portion of the horizontal part of the facial canal. See: horizontal part of facial canal. Synonym: lateral crus of horizontal part of the facial canal. (05 Mar 2000) |
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| Laurer's canal | A tube originating on the surface of the ootype of trematodes, directed dorsally to or near the surface; it may have originally served as a vagina or possibly as a reservoir of excess shell material. (05 Mar 2000) |
| Lauth's canal | sinus venosus sclerae |
| Lowenberg's canal | Spiral tube in the bony canal of the cochlea, lying on its outer wall between the scala vestibuli and scala tympani. (12 Dec 1998) |