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Pertaining to, or discovered by, J. F. Meckel, a German anatomist. Meckelian cartilage, the cartilaginous rod which forms the axis of the mandible; -- called also Meckel's cartilage.

is used in barometers, thermometers, ect. Specific gravity 13.6. Symbol Hg (Hydrargyrum). Atomic weight 199.8. Mercury has a molecule which consists of only one atom. It was named by the alchemists after the god Mercury, and designated by his symbol, mercury.

A hypothetical radical derived from ammonium by the substitution of metallic atoms in place of hydrogen.

The act, process, or result of exchange, substitution, or replacement of atoms and radicals; thus, by metathesis an acid gives up all or part of its hydrogen, takes on an equivalent amount of a metal or base, and forms a salt.

The weight of the half hydrogen molecule, or of the hydrogen atom, taken as the standard in comparing the atomic weights of the elements; thus, an atom of oxygen weighs sixteen microcriths. See Crith. J. P. Cooke.

said of the properties or motions of masses, as distinguished from those of molecules or atoms. Carpenter.

with, produced by, or consisting of, molecules; as, molecular forces; molecular groups of atoms, etc. Molecular attraction (Phys.), attraction acting between the molecules of bodies, and at insensible distances. -- Molecular weight (Chem.), the weight of a molecule of any gas or vapor as compared with the hydrogen ato…

A group of atoms so united and combined by chemical affinity that they form a complete, integrated whole, being the smallest portion of any particular compound that can exist in a free state; as, a molecule of water consists of two atoms of hydrogen and one of oxygen. Cf. Atom.

, and when reduced obtained as a hard, silver-white, difficulty fusible metal. Symbol Mo. Atomic weight 95.9.

Having one hydrogen atom replaceable by a negative or acid atom or radical; capable of neutralizing a monobasic acid; -- said of bases, and of certain metals.

An ultimate atom, or simple, unextended point; something ultimate and indivisible.

e, single, alone; as, monocarp, monopoly; (Chem.) indicating that a compound contains one atom, radical, or group of that to the name of which it is united; as, monoxide, monosulphide, monatomic, etc.

e of being neutralized by a univalent base or basic radical; having but one acid hydrogen atom to be replaced; -- said of acids; as, acetic, nitric, and hydrochloric acids are monobasic.

A sulphide containing one atom of sulphur, and analogous to a monoxide; -- contrasted with a Ant: polysulphide; as, galena is a monosulphide.

An oxide containing one atom of oxygen in each molecule; as, barium monoxide.

Of or pertaining to disease or diseased parts; as, morbid anatomy.

Quality, state, or degree, of a multivalent element, atom, or radical.

That part of anatomy which treats of muscles.

The dissection, or that part of anatomy which treats of the dissection, of muscles.

ed. Nascent state (Chem.), the supposed instantaneous or momentary state of an uncombined atom or radical just separated from one compound acid, and not yet united with another, -- a hypothetical condition implying peculiarly active chemical properties; as, hydrogen in the nascent state is a strong reducer.…