lightshiftThe change in the energy (and thus frequency) of light upon interaction with matter.
lightshipA ship riding at anchor and displaying a light for the guidance of sailors, in a position where a fixed lighthouse structure would be impracticable.
lightskinA black, mixed race, Indigenous, Latino, or other person of color who has relatively light-coloured skin.
lightweightA particular weight class, or member of such, as prescribed by the rules, between that of the heavier welterweight and the lighter featherweight. See Wikipedia for the specifics of each sport.
lightweightnessThe quality or condition of being lightweight.
lightwellAn open shaft that transmits light from above into a staircase or an inner room.
lightwhipA whip-like weapon with a lash resembling a light beam.
lightwoodAny wood used to light a fire; kindlings; especially, very resinous pine wood.
lightworkThe activities of a lightworker (New Age sense).
lightworkerA person driven and motivated to do work which makes the world a better place, improves people's lives, and/or elevates people to a higher level of consciousness.
lightworkingThe activities of a lightworker (New Age sense).
lightwortA flowering plant in the borage family, of species Mertensia maritima.
ligiidAny member of the family Ligiidae of woodlice.
ligmaA notional disease mentioned to trick the interlocutor into inquiring as to its nature, whereupon the speaker responds by saying ligma balls (lick my balls) as a prank.
lignanAny of a class of phenylpropanoid (propylbenzene) type of molecules found in essentially all plants, generally dimeric or higher order, and produced by secondary metabolic pathways branching off of aromatic amino acid biosynthesis, in some cases having associated antioxidant or estrogenic (phytoestrogenic) activities; having in common with lignin the phenylpropanoid monomers, where lignin is a random oxidative polymerization of the same
lignanamideAny of a group of polycyclic aromatic amides preset in some wood or roots
lignaneThe hydrocarbon formed by joining two propylbenzene residues at the β-carbon atom of the propyl side chain; this structure is the basis of all lignans
ligustilideThe lactone (3Z)-3-butylidene-4,5-dihydro-2-benzofuran-1-one, isolated from plants of the genus Ligusticum, used as a cardiovascular therapy
ligustralAn aldehyde 2,4-dimethyl-3-cyclohexenecarboxaldehyde present in privet