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A group of corals in which the coral is not porous; -- opposed to Perforata.

cterial resting cell, -- formerly considered a spore, but now known to occur even in endosporous bacteria. -- Ar`thro*spor"ic (#), Ar*thros"po*rous (#), a.

ascending or arising, as in distillation; also that which arises, as from distillation. Vaporous ascensions from the stomach. Sir T. Browne. Ascension Day, the Thursday but one before Whitsuntide, the day on which commemorated our Savior's ascension into heaven after his resurrection; -- called also Holy Thursday. --…

t or process of separating mingled gases of unequal diffusibility by transmission through porous substances.

the carbon by nitric acid or a chromic acid mixture, the two plates being separated by a porous cup.

Open or spongy, as some porous bones.

The interlacing osseous plates constituting the elastic porous tissue of certain parts of the bones, esp. in their articular extremities.

Having a spongy or porous stracture; made up of cancelli; cancellated; as, the cancellous texture of parts of many bones.

Burnt sugar; a brown or black porous substance obtained by heating sugar. It is soluble in water, and is used for coloring spirits, gravies, etc.

rounded fragments, rarely distinctly crystallized, with a texture varying from compact to porous.

A filter, as for sugar, in which a cylinder with a porous or foraminous periphery is rapidly rotated so as to drive off liquid by centrifugal action.

A porous earthen pot used in India for cooling water, etc.

les; specif., a device for noiseless heating of water by steam, in a vessel filled with a porous mass, as of pebbles.

An explosive substance consisting of nitroglycerin absorbed by some inert, porous solid, as infusorial earth, sawdust, etc. It is safer than nitroglycerin, being less liable to explosion from moderate shocks, or from spontaneous decomposition.

The passage of gases, vapors, or liquids thought membranes or porous media from within outward, in the phenomena of osmose; -- opposed to endosmose. See Osmose.

Any porous substance, as cloth, paper, sand, or charcoal, through which water or other liquid may passed to cleanse it from the solid or impure matter held in suspension; a chamber or device containing such substance; a strainer; also, a similar device for purifying air. Filter bed, a pond, the bottom of which is a fil…

Having foramina; full of holes; porous. Bacon.

Smoky; vaporous. Sir T. Broune.

onaria, including those forms which have a firm and usually branched axis, covered with a porous crust, or c

A porous earthen jar for cooling water by evaporation.