The Collaborative International Dictionary of English v.0.48:

Ler \Ler\ n. (Irish mythology)
   the sea personified; father of Manannan; corresponds to the
   Welsh Llyr.

   Syn: Lir.
        [WordNet 1.5]

The Collaborative International Dictionary of English v.0.48:

Llyr \Llyr\ prop. n. (Welsh mythology)
   the sea personified, father of Manawydan; corresponds to the
   Irish Ler.
   [WordNet 1.5]

WordNet (r) 3.0 (2006):

Ler
    n 1: the sea personified; father of Manannan; corresponds to
         Welsh Llyr [syn: Lir, Ler]

The Free On-line Dictionary of Computing (19 January 2023):

LER

   1.  Label Edge Router.

   2.  Light-Emitting Resistor.

   [Jargon File]

   (1999-06-30)


The Jargon File (version 4.4.7, 29 Dec 2003):

LER
 /L·E·R/

    n.

    1. [TMRC, from ‘Light-Emitting Diode’] A light-emitting resistor (that is,
    one in the process of burning up). Ohm's law was broken. See also SED.

    2. An incandescent light bulb (the filament emits light because it's
    resistively heated).