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ng power to grant it; specifically (Law), a supplication to government, in either of its branches, for the granting of a particular grace or right; -- in distinction from a memorial, which calls certain facts to mind; also, the written document. Petition of right (Law), a petition to obtain possession or restitution of…

That branch of pharmacology which treats of the action and the effects of medicines.

That branch of pharmacology which considers the mode of action, and the effects, of medicines. Dunglison.

That branch of pharmacology which treats of unprepared medicines or simples; -- called also pharmacography, and pharmacomathy.

rtilage; especially, one of the lower pharyngeals, which belong to the rudimentary fifth branchial arch in many fishes, or one of the upper pharyngeals, or pharyngobranchials, which are the dorsal elements in the complete branchial arches.

has one or two external openings through the nose in the higher vertebrates, and lateral branchial openings in fishes and some amphibias.

The dephasing of the two parts of a single alternating current in two dissimilar branches of a given circuit.

A branch of anatomy which treats of the veins.

The branch of chemistry which relates to the effect of light in producing chemical changes, as in photography.

The branch of science which treats of the relation of magnetism to light.

That branch of science which treats of the measurement of the intensity of light.

That branch of science which relates to the mind; mental philosophy. [R.]

nt body ranges from an undifferentiated mass of protoplasm to a well-developed and much- branched mycelium. Reproduction is mainly sexual, by the formation of conidia or sporangia; but the group shows every form of transition from this method through simple conjugation to perfect sexual reproduction by egg and sperm in…

A branch of a plumularian hydroid specially modified in structure for the protection of the gonothecæ.

A flattened stem or branch which more or less resembles a leaf, and performs the function of a leaf as regards respiration and assimilation.

flattened or leaflike legs, often very numerous, which they use in swimming. Called also Branchiopoda.

One of the larger divisions of the animal kingdom; a branch; a grand division.

The science of nature, or of natural objects; that branch of science which treats of the laws and properties of matter, and the forces acting upon it; especially, that department of natural science which treats of the causes (as gravitation, heat, light, magnetism, electricity, etc.) that modify the general properties…

the history of the development of vital activities, in the individual, being one of the branches of ontogeny. See Morphogeny. Haeckel.

tions, or the history of the paleontological development of vital activities, -- being a branch of phylogeny. See Morphophyly. Haeckel.