=Magnesium=, _n._ A metal, very abundant in sea water and in the
earth’s crust. Also found in the composition of animals and some
plants.
=Mandrake=, _n._ A plant with umbrella-like leaves and a yellow, juicy
fruit as large as an egg.
=Microscope=, _n._ From two Greek words meaning “small” and “view”; an
instrument which magnifies and renders visible bodies too small to
be seen by the naked eye.
=Moth=, _n._ An insect resembling a butterfly. Moths have no knobs on
their antennæ, or “feelers,” and butterflies have.
=Mullein=, _n._ A tall, stout weed with thick, wooly leaves.