| leptocephalus | (n) slender transparent larva of eels and certain fishes |
| leptodactylidae | (n) New World frogs; in some classifications essentially coextensive with the family Bufonidae, Syn. family Leptodactylidae |
| leptodactylid frog | (n) toothed frogs: terrestrial or aquatic or arboreal, Syn. leptodactylid |
| leptodactylus | (n) type genus of the Leptodactylidae; in some classifications placed in the family Bufonidae, Syn. genus Leptodactylus |
| leptoglossus | (n) leaf-footed bugs, Syn. genus Leptoglossus |
| leptomeninges | (n) the two innermost layers of the meninges; cerebrospinal fluid circulates between these innermost layers |
| leptomeningitis | (n) inflammation of the leptomeninges |
| lepton | (n) 100 lepta equal 1 drachma in Greece |
| lepton | (n) an elementary particle that participates in weak interactions; has a baryon number of 0 |
| leptopteris | (n) including some ferns sometimes placed in genus Todea, Syn. genus Leptopteris |
| Leptocardia | ‖n. pl. [ NL., fr. Gr. |
| Leptocardian | a. (Zool.) Of or pertaining to the Leptocardia. -- |
| Leptocercous | |
| Leptodactyl | n. [ Gr. |
| Leptodactylidae | n. [ See leptodactyl. ] A natural family of New World frogs; in some classifications it is essentially coextensive with the family |
| Leptodactylous | a. Having slender toes. [ 1913 Webster ] |
| Leptodactylus | n. The type genus of the |
| Leptoglossus | n. A genus of leaf-footed bugs. |
| Leptology | n. [ Gr. |
| Leptomeningitis | ‖n. [ NL., fr. Gr. |