What is the meaning of L-?

deprecated notation for levorotatory (versus modern notation, (−)).

The l-classifier, one of four classifiers which obligatorily appear in every Ahtna verb with a variety of purposes. The l-classifier has the following uses:

1. Forms the passive of (mostly transitive) verbs with the ł-classifier
2. Forms many intransitive verbs
3. Forms iterative verbs via classifier shift from the ł-classifier (with the prefix na-)

   Forms the passive of (mostly transitive) verbs with the ł-classifier

   Forms many intransitive verbs

   Forms iterative verbs via classifier shift from the ł-classifier (with the prefix na-)

   Forms reciprocal verbs

   Forms benefactive verbs

   Forms reflexive verbs

   Forms mediopassive verbs

   Forms neuter (adjectival) verbs from nouns

   Forms transitive verbs with incorporated objects

   With the d-qualifier, appears in many imitative and onomatopoeic verbs

   With cinʼ- and the d-qualifier, forms verbs with a meaning of 'pretending to.'

   Appears in many verbs with no clear function

   One of four "classifier" valency prefixes mandatory on all Lower Tanana verbs. The l-classifier has the following uses:

   1. Forms many intransitive verbs

      Forms many intransitive verbs

      Forms intransitive reflexive verbs

      Forms intransitive verbs with an incorporate as their object

      With a gender prefix, forms dimensional neuter adjectival verbs.

      With the d-qualifier, forms onomatopoeic verbs

      The l-classifier, one of several classifiers which obligatorily appear in every Wailaki verb, used primary to passivize transitive verbs formed with the ł-classifier.

      alternative form of il-

      the l- classifier or valence-change prefix, a detransitivizing prefix of active verbs that modifies the transitivity or valence and grammatical voice of a verb, and occurs in most passive, mediopassive, reflexive, and reciprocal verbs that are derived from verbs with a ł- classifier

      Source: wiktionary.org