Search the Dictionary

A picrate compound, used as an explosive in blasting.

e under Angelica. -- Hercules powder, an explosive containing nitroglycerin; -- used for blasting.

nce; -- called also dumping scow. Bell and hopper (Metal.), the apparatus at the top of a blast furnace, through which the charge is introduced, while the gases are retained. -- Hopper boy, a rake in a mill, moving in a circle to spread meal for drying, and to draw it over an opening in the floor, through which it fal…

The hollow stem of a hydroid, either simple or branched. See Illust. of Gymnoblastea and Hydroidea.

Same as Hypoblast.

Same as Hypoblast.

To invoke evil upon; to curse; to swear at. In vain we blast the ministers of Fate, And the forlorn physicians imprecate. Rochester.

), etc. There are three main classes: (1) gas engines proper, using fixed gases, as coal, blast-furnace, or producer gas; (2) engines using the vapor of a volatile fluid, as the typical gasoline (petrol) engine;

An inner wall; specifically (Metal.), the inner wall, or lining, of a blast furnace.

ickel and cobalt. Cf. Meteorite. -- Pig iron, the form in which cast iron is made at the blast furnace, being run into molds, called pigs. -- Reduced iron. See under Reduced. -- Specular iron. See Hematite. -- Too many irons in the fire, too many objects requiring the attention at once. -- White iron. See Cast iro…

A process by which copper matte is treated by passing through it a blast of air, to oxidize and remove sulphur. It is analogous in apparatus to the Bessemer process for decarbonizing cast iron. So called from Pierre Manhès, a French metallurgist, who invented it.

The outer wall and casing of a blast furnace, above the hearth. Raymond.

Filled with spongy pith; pithy. Medullary groove (Anat.), a groove, in the epiblast of the vertebrate blastoderm, the edges of which unite, making a tube (the medullary canal) from which the brain and spinal cord are developed. -- Medullary rays (Bot.), the rays of cellular tissue seen in a transverse section of exoge…

A combining form meaning part, portion; as, blastomere, epimere.

The part of the mesoblast which gives rise to the connective tissues and blood.

the alimentary canal which is developed from the primitive enteron and is lined with hypoblast. It is distinguished from the stomod, a part at the anterior end of the canal, including the cavity of the mouth, and the proctod, a part at the posterior end, which are formed by invagination and are lined with epiblast.…

The layer of the blastoderm, between the ectoderm and endoderm; mesoblast. See Illust. of Blastoderm and Ectoderm.

The nucleus of a cell; mesoblast. Agassix.

One of the smaller cells, or blastomeres, resulting from the complete segmentation of a telolecithal ovum.

The sphere or globular mass of cells (blastomeres), formed by the clevage of the ovum or egg in the first stages of its development; -- called also mulberry mass, segmentation sphere, and blastosphere. See Segmentation.