Search the Dictionary

One of a pair of scent organs which the larvæ of certain butterflies emit from the first body segment, either above or below.

The olfactory organ of some Mollusca. It is connected with the organ of respiration.

The organic basis of bone tissue; the residue after removal of the mineral matters from bone by dilute acid; in embryonic tissue, the substance in which the mineral salts are deposited to form bone; -- called also ostein. Chemically it is the same as collagen.

An auditory cyst or vesicle; one of the simple auditory organs of many invertebrates, containing a fluid and otoliths; also, the embryonic vesicle from which the parts of the internal ear of vertebrates are developed.

alcareous or other hard substance in the internal ear of vertebrates, and in the auditory organs of many invertebrates; an ear stone. Collectively, the otoliths are called ear sand and otoconite.

The essential female reproductive organ in which the ova are produced. See Illust. of Discophora.

s, as in Crustacea, that retain the eggs after they have been excluded from the formative organs, until they are hatched.

The organ with which many insects and some other animals deposit their eggs. Some ichneumon files have a long ovipositor fitted to pierce the eggs or larvæ of other insects, in order to lay their own eggs within the same.

The old theory that the egg contains the whole embryo of the future organism and the germs of all subsequent offsprings and is merely awakened to activity by the spermatozoön; -- opposed to spermism or animalculism.

An organ which produces both ova and spermatozoids; an hermaphrodite gland.

lish; taste; liking; -- a sense originating in the mistaken notion that the palate is the organ of taste. Hard task! to hit the palate of such guests. Pope.

In the organ, a valve between the wind chest and the mouth of a pipe or row of pipes.

A feeler; especially, one of the jointed sense organs attached to the mouth organs of insects, arachnids, crustaceans, and annelids; as, the mandibular palpi, maxillary palpi, and labial palpi. The palpi of male spiders serve as sexual organs. Called also palp. See Illust. of Arthrogastra and Orthoptera.…

ted in length by the musical scale, and fastened together side by side; a syrinx; a mouth organ; -- said to have been invented by Pan. Called also Pan's pipes and Panpipes.

The doctrine that all organisms must come from living parents; biogenesis; -- the opposite of Ant: spontaneous generation.

xed; as paraldehyde, paraconine, etc.; also, an isomeric modification. (b) Specifically: (Organ. Chem.) That two groups or radicals substituted in the benzene nucleus are opposite, or in the respective positions 1 and 4; 2 and 5; or 3 and 6, as paraxylene; paroxybenzoic acid. Cf. Ortho-, and Meta-. Also used adjectivel…

Pertaining to, or designating, an organic acid obtained as a deliquescent white crystalline substance, and isomeric with itaconic, citraconic, and mesaconic acids.

Pertaining to, or designating, an organic acid metameric with malic acid.

Of, pertaining to, or connected with, the parenchyma of a tissue or an organ; as, parenchymatous degeneration.

The walls of a cavity or an organ; as, the abdominal parietes; the parietes of the cranium.