Lamellar

Thin and platy.

Lanceolate

A shape that is rounded at one end, and pointy at the other, like some leaves. Also "lance" shaped.

Larva

An intermediate stage between egg and adult in some animals. (Plural Larvae)

Latex

A white sticky fluid that flows from the cut surfaces of some plants.

Lava

Molten rock, or magma, that has been exposed at the Earth's surface, sometimes through a volcanic eruption.

Leukocyte

A type of white blood cell that is filled with enzymes that digest microorganisms, such as bacteria.

Light year

The distance light travels in one year. Light travels at a rate of about 300 million meters per second, and there are about 3.156*10⁷ seconds in a year, which is a distance of about 9.46810¹⁵meters. (If you're unfamiliar with distance in meters, one meter is about 3.28 feet. That means light travels about 3.11*10¹⁶ feet in one year!)

Lignicolous

A term that refers to any type of fungi that lives on, and eats wood.

Lignin

An organic polymer that is used to bind the cellulose fibers in wood helps strenghten cell walls.

Lipid

A fatty, oily, or waxy substance that is typically insoluble in water, but can be soluble in other organic compounds.

Lithosphere

In geology, the name for the outer, rocky part of the Earth, also refered to as the crust.

Image can be found at Classroom@Sea: The Carlsberg Ridge Cruise.

Lymph node

A round mass of lymphatic tissue which filters lymphatic fluid.

Lymphatic fluid

Also known simply as lymph. A clear fluid that carries lymphocytes to help fight infection.

Lymphatic tissue

Tissue in the body that helps the immune system fight infection.

Lymphocyte

A non-granular leukocyte that can be found in lymphatic tissue (e.g. the lymph nodes) which aids in immune response by producing antibodies.

Lytic

A term referring to anything that has the ability to destroy a cell by rupturing its plasma membrane.

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