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mains of a molecule after the removal of a portion of its constituents; hence, an atom or group regarded as a portion of a molecule; -- used as nearly equivalent to radical, but in a more general sense.

oints, forming irregular meshes. It includes the shelled Foraminifera, together with some groups which lack a true shell.

One of group of two to four united cells which occupy the axial part of the ocelli, or ommatidia, of the eyes of invertebrates, and contain the terminal nerve fibrillæ. See Illust. under Ommatidium.

One of the group of pigmented cells which surround the retinophoræ of invertebrates. See Illust. under Ommatidium.

A group of spiders which spin irregular webs; -- called also Retitelariæ.

One of the Rhipiptera, a group of insects having wings which fold like a fan; a strepsipter.

ch have pseudopodia, by means of which they move about and take their food. The principal groups are Lobosa (or Amoebea), Helizoa, Radiolaria, and Foraminifera (or Reticularia). See Protozoa.

A rare element of the light platinum group. It is found in platinum ores, and obtained free as a white inert metal which it is very difficult to fuse. Symbol Rh. Atomic weight 104.1. Specific gravity 12.

A group of Coleoptera having a snoutlike head; the snout beetles, curculios, or weevils.

A projecting mold, or group of moldings, forming with others a pattern, as on a ceiling, ornamental door, or the like.

A circular group of persons. And hears the Muses in a Aye round about Jove's alter sing. Milton.

A translucent mineral of a green color and micaceous structure, belonging to the chlorite group; a hydrous silicate of alumina, magnesia, and iron; -- called also clinochlore.

ents are periodic functions of their atomic wieghts. "In other words, if the elements are grouped in the order of their atomic weights, it will be found that nearly the same properties recur periodically throughout the entire series." The following tabular arrangement of the atomic weights shows the regular recurrence…

Any one of several species of Florida and Bermuda groupers of the genus Epinephelus.

Any structure having a flowerlike form; especially, the group of five broad ambulacra on the upper side of the spatangoid and clypeastroid sea urchins. See Illust. of Spicule, and Sand dollar, under Sand.

An order of minute worms which usually have one or two groups of vibrating cilia on the head, which, when in motion, often give an appearance of rapidly revolving wheels. The species are very numerous in fresh waters, and are very diversified in form and habits.

A smoothly running passage of short notes (as semiquavers, or sixteenths) uniformly grouped, sung upon one long syllable, as in Handel's oratorios.

An assembly; a group; a circle; as, a round of politicians. Addison.

us with pyridine, obtained from coal tar as an oily liquid, C11H17N; also, any one of the group od metameric compounds of which rubidine is the type.

A tool on which lenses are fastened in a group, for polishing or grinding.