Search the Dictionary

generations may follow, but if meanwhile the host is bitten by a mosquito, the parasites develop into gametes in the stomach of the insect. These conjugate, the zygote thus produced divides, forming spores, and eventually sporozoites, which, penetrating to the salivary glands of the mosquito, may be introduced into a…

andibular arch (Anat.), the most anterior visceral arch, -- that in which the mandible is developed.

e source of Evil. The Manichæans stand as representatives of dualism pushed to its utmost development. Tylor.

To cultivate by manual labor; to till; hence, to develop by culture. [Obs.] To whom we gave the strand for to manure. Surrey. Manure thyself then; to thyself be improved; And with vain, outward things be no more moved. Donne.

A system or wireless telegraphy developed by G. Marconi, an Italian physicist, in which Hertzian waves are used in transmission and a coherer is used as the receiving instrument.

A fat herring with undeveloped roe. [Written also matty.] [Eng. & Scot.]

Brought by natural process to completeness of growth and development; fitted by growth and development for any function, action, or state, appropriate to its kind; full-grown; ripe. Now is love mature in ear. Tennison. How shall I meet, or how accost, the sage, Unskilled in speech, nor yet mature of age Pope.…

The state or quality of being mature; ripeness; full development; as, the maturity of corn or of grass; maturity of judgment; the maturity of a plan.

ised elaborately carved temples and places, and they possessed a superior calendar, and a developed system of hieroglyphic writing, with records said to go back to about 700 a. d.

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 exogenous wood, which pass from the pith to the bark. -- Medullary sheath (Anat.), the layer of white semifluid substance (myelin),…

A larva, in a stage following the zoëa, in the development of most crabs. In this stage the legs and abdominal appendages have appeared, the abdomen is relatively long, and the eyes are large. Also used adjectively.

An indue development of dark-colored pigment in the skin or its appendages; -- the opposite of albinism.

Development of dark-pigmented tumors.

A picture produced by a process in which development after exposure may be deferred indefinitely, so as to permit transportation of exposed plates; also, the process itself.

All that part of 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 w…

The middle one of the three pairs of embryonic renal organs developed in most vertebrates; the Wolffian body.

pecies undergoes in a series of successively produced individuals, extending from the one developed from the ovum to the final perfected individual. Hence, metagenesis involves the production of sexual individuals by nonsexual means, either directly or through intervening sexless generations. Opposed to monogenesis. Se…

A change in the form or function of a living organism, by a natural process of growth or development; as, the metamorphosis of the yolk into the embryo, of a tadpole into a frog, or of a bud into a blossom. Especially, that form of sexual reproduction in which an embryo undergoes a series of marked changes of external…

The most posterior of the three pairs of embryonic renal organs developed in many vertebrates.

cells, which are metamorphosed into the tissues of the body. A central cavity is commonly developed, and the cells around it are at first arranged in two layers, -- the ectoderm and endoderm. The group comprises nearly all animals except the Protozoa.