Definitions
from The American Heritage® Dictionary of the English Language, 4th Edition
 The symbol for the Roman numeral 50.
 abbr. lambert
 abbr. large
 abbr. left
 abbr. low
from Wiktionary, Creative Commons Attribution/ShareAlike License
 n. The twelfth letter of the basic modern Latin alphabet.
 n. Symbol for liter or litre.
 n. Symbol for the Roman numeral 50; Previous XLIX 49, Next LI 51
 n. IUPAC 1letter abbreviation for leucine
 n. The twelfth letter of the English alphabet, called el and written in the Latin script.
 n. The ordinal number twelfth, derived from this letter of the English alphabet, called el and written in the Latin script.
 n. The statistic for the number of losses by a team or player limited by some criteria (e.g. this season, at home, on turf)
 n. Alternative spelling of el (elevated train).
 abbr. Libertarian.
Etymologies
Sorry, no etymologies found.
Examples

L'« — » + L''* — » + L*'* — 3 («_ i) + K X N''* muft be taken

A language L is open if it can be extended to a new language L² without changes in the meanings of other expressions; otherwise

But the firstorder language L is certainly not reducible to the language L² of syllogisms, since in L we can write down a sentence saying that exactly three elements satisfy

Given two languages L and L², we can compare them by asking whether every class Mod (S), with S a sentence of L, is also a class of the form Mod (S²) where S² is a sentence of L².

If the answer is Yes, we say that L is reducible to L², or that L² is at least as expressive as L.

Recall that a translation from a logic L into a logic L² is a mapping f between the respective sets of formulas which preserves derivability, that is:

We could repeat the recursion clauses for L to produce a full theory of truth for L².

Then for every predicate E (x) of expressions of L defined in L+ one can prove in L+ a general sentence of the form

He still did not look at Melody until she reached out and took him hand in hers. 1 __ a l l  L _ L L

In S and S′ are lamps L, L′ and experimenters E, E′ as indicated.
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Jubjub commented on the word L
Boy
January 2, 2010