noun
definition
A fully grown human or animal.
definition
A person who has reached the legal age of majority.
verb
definition
To (cause to) be or become an adult.
definition
To behave like an adult.
adjective
definition
Fully grown.
example
an adult human, animal, or plant
definition
Intended for or restricted to adults rather than children.
example
adult clothes
definition
Containing material of an explicit sexual nature; of, or pertaining to, pornography.
example
This program contains adult content. Parental discretion is advised.
definition
Vulgar or profane.
Examples of adult in a Sentence
Who's the adult here?
He's an adult, or nearly so.
Two of the cats, young and small enough to be kittens or perfectly sized adult tarantulas, detangled and darted from her pillow to the table.
Irregular adult workmen earn between lod.
The response made by the adult parts of plants, to which reference has been made, is brought about by a mechanism similar in nature though rather differently applied.
Opisthobranchs provided in the adult state with a shell and a mantle, except Runcina, Pleuro.
In all species it has the same shape, a shape which has been retained in the adult by the Lower Cambrian genus Iphidea.
A growth both of the funnel, which becomes multicellular, and of the rest of the nephridium produces the adult nephridia of the genera mentioned.
The Mosaic Institute contained an agrarian law, based upon an equal division of the soil amongst the adult males, a census of whom was taken just before their entrance into Canaan.
The male scales differ in form from the female; the adult male is winged, and is rarely seen.
Large pits are dug across the line of advance of these great insect armies to stop them when in the larval or wingless stage, and even huge bonfires are lighted to check their flight when adult.
In forms which are naked in the adult state, the shell falls off soon after the reduction of the velum, but in Cenia, Runcina and Vaginula the shell-gland and shell are not developed, and the young animal when hatched has already the naked form of the adult.
In those Euthyneura in which the shell is entirely absent in the adult, it is, except in the three genera Cenia, Runcina and Vaginula, developed in the larva and then falls off.
From the fact that Aplysia commences its life as a free-swimming veliger with a nautiloid shell not enclosed in any way by the border of the mantle, it is clear that the enclosure of the shell in the adult is a secondary process.
This forms the nucleus of the adult shell, and, as the animal grows, becomes enclosed by a reflection of the mantle-skirt.
In Clausilia a peculiar modification of this lid exists permanently in the adult, attached by an elastic stalk to the mouth of the shell, and known as the " clausilium."
It is important here to note that Clausilia furnishes us with an exceptional instance of the continuity of the shell or secreted product of the primitive shell - sac with the adult shell.
This bilobed sac becomes entirely the liver in the adult; the intestine and stomach are formed from the pedicle of invagination, whilst the pharynx, oesophagus and crop form from the stomodaeal invagination ph.
The most important fact about them is that they disappear, and are in no way connected with the typical nephridium of the adult.
They differ much according to the kind of insect, and in the adult according to sex.
In some forms the coiling disappears in the adult, leaving the shell simply conical as in Patellidae, Fissurellidae, &c., and in some cases the shell is coiled in one plane, e.g.
Adult without shell; a sub-epithelial pseudoconch formed by connective tissue; pallial cavity ventral.
The ejaculatory duct which opens on the ninth abdominal sternum in the adult male arises in the tenth abdominal embryonic segment and subsequently moves forward.
The adult caterpillar may be described as a creature the hypodermis of which is studded with Adapted from Koerschelt and buds that expand and form the butterHerder, and Lowne.
An adult Hexapod is provided with a firm, well-chitinized cuticle and six conspicuous jointed legs.
Although one of the characteristics of insects is the brevity of their adult lives, a considerable number of exceptions to the general rule have been discovered.
Moreover, the author goes on to remark that in adult birds trace of the origin of the sternum from five centres of ossification is always more or less indicated by sutures, and that, though these sutures had been generally regarded as ridges for the attachment of the sternal muscles, they indeed mark the extreme points of the five primary bony pieces of the sternum.
His only unfortunate contribution to entomology - indeed to zoology generally - was his theory of pre-formation, which taught the presence within the egg of a perfectly formed but miniature adult.
The females outnumber the males by about 20,000, which is, however, about the number of adult males away from the country at any given period.
No other intermediate stages have as yet been noticed between this arrangement and that of the Heteronemertini, in which a separate posterior brain-lobe receives a similar ciliated canal, and in which the oesophageal outgrowths have made their appearance and are coalesced with the nerve-tissue in the organ of the adult animal.
Two pairs of invaginations of B the skin, which originally are called the prostomial and metastomial disks, grow round the intestine, finally fuse together, and form the skin and mus- cular body-wall of the future Nemertine, which afterwards becomes ciliated, frees itself from the pilidium investment and develops into the adult worm without further metamorphosis.
As the animals become adult, diverticula arise on the tubes of these organs, which develop either spermatozoa or ova.
Again, the adult Pentastomum shows no trace of appendages, unless the two pairs of chitinous hooks are to be regarded as the vestiges of jaws or ambulatory limbs.
The adult and immature stages are, however, by no means confined respectively to carnivorous and herbivorous species of mammals.
The adult stage, for example, has been found in the nasal passages of sheep, goats, horses and even of man, and the larval stage in the pleural and peritoneal cavities of dogs and cats.
The right to determine the electoral franchise is vested in the legislature itself and that body has conferred it upon practically all adult males.
By this time the embryo has all the organs of the adult perfected save only the reproductive; these develop only when the first host is swallowed by the second or final host, in which case the parasite attaches itself to the wall of the alimentary canal and becomes adult.
A curious feature shared by both larva and adult is the large size of many of the cells, e.g.
In the adult of both sexes there are only two teeth, both in the upper jaw, which lie horizontally side by side, and in the female remain throughout life concealed in cavities of the bone.
By means of the Adult Schools, Friends have been able to exercise a religious influence beyond the borders of their own Society.
A strong interest in Sunday schools for children preceded the Adult School movement.
See also works mentioned at the close of sections on Adult Schools and on Quakerism in America, Scotland and Ireland, and elsewhere in this article; also Fox, George.
An annual poll-tax is also collected for the schools from every adult male.
Direct development, in which the adult form is achieved without striking metamorphosis by a gradual succession of stages, seems to be confined to the family Balanoglossidae.
The remaining two families of Enteropneusta, Ptychoderidae and Spengelidae, contain species of which probably all pursue an indirect course of development, culminating in a metamorphosis by which the adult form is attained.
In addition to this ciliated band the form of the Tornaria is quite characteristic and unlike the adult.
As in the case of the Lamellibranchiata, the shell of the adult is not a direct derivative of the youngest shell of the larva.
The young Brachiopod in all its species is protected by an embryonic shell called the " protegulum," which sometimes persists in the umbones of the adult shells but is more usually worn off.
The larval forms are provided with eye-spots, but no very specialized sense organs are found in the adult.
The larva now assumes specific characters and is practically adult.