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Any essential part, as a post, tie rod, strut, etc., of a framed structure, as a bridge truss.

The middle layer of tissue in some vegetable structures.

Having the form or structure of a metal.

same proportion by weight, and with the same molecular weight, but possessing a different structure and different properties; as, methyl ether and ethyl alcohol are metameric compounds. See Isomeric.

The symmetry of a metameric structure; serial symmetry; the state of being made up of metameres.

Causing a change of structure.

Change of form, or structure; transformation.

The part of geology relating to structure and organisms which require to be studied with a microscope.

Analysis of the structure of materials from careful observation of photomicrographs.

A rock showing under the microscope the structure of a graphic granite (pegmatite). -- Mi`cro*peg`ma*tit"ic, a.

ghout the various stages of development; of the same or of an essentially similar type of structure; -- opposed to dimorphic, trimorphic, and polymorphic.

That branch of biology which deals with the structure of animals and plants, treating of the forms of organs and describing their varieties, homologies, and metamorphoses. See Tectology, and Promorphology.

To lose vitality and organic structure, as flesh of a living body; to gangrene.

A cryptogamous plant of a cellular structure, with distinct stem and simple leaves. The fruit is a small capsule usually opening by an apical lid, and so discharging the spores. There are many species, collectively termed Musci, growing on the earth, on rocks, and trunks of trees, etc., and a few in running water.…

The lowest sill of a structure, usually embedded in the soil; the lowest timber of a house; also, that sill or timber of a bridge which is laid at the bottom of the water. See Sill.

ified; made up of many differing parts; manifold. There is a multifarious artifice in the structure of the meanest animal. Dr. H. More.

Having the form or structure of flies of the genus Musca, or family Muscidæ.

mineral of blackish lead-gray color and metallic luster, generally of a foliated massive structure; foliated tellurium. It is a telluride of lead and gold.

occuring in groups of glassy acicular crystals, and in masses which often have a radiated structure. It is a hydrous silicate of alumina and soda.

about mainly by gradual changes of environment which have led to corresponding changes of structure, and that those forms which have become so modified as to be best adapted to the changed environment have tended to survive and leave similarly adapted descendants, while those less perfectly adapted have tended to die o…