n. [ Gr. &unr_; self-taught. ] One who is self-taught; an automath. [ 1913 Webster ]

a. [ Auto- + dynamic. ] Supplying its own power, as a hydraulic ram. [ Webster 1913 Suppl. ]

n. [ Gr. blasto`s sprout + E. derm. ] (Embryology) the early stage of an embryo after the first cleavages of the ovum; also, the layer of cells of which the early embryo is composed; specifically: (a) the early embryo developing from a blastodisc, after the blastocoel has formed. (b) in an insect embryo, the layer of cells that surrounds the internal mass of the yolk. [ PJC ]

{ } a. Of or pertaining to the blastoderm. [ 1913 Webster ]

n. a disc-shaped layer of cells on the surface of the yolk mass of an egg (such as that of a bird) which develops to form the embryo.
Syn. -- germinal disc, germinal area. [ WordNet 1.5 +PJC ]

‖n. [ NL., fr. Gr. ke`ras, ke`ratos horn + &unr_; tooth. ] (Zool.) A genus of ganoid fishes, of the order Dipnoi, first known as Mesozoic fossil fishes; but recently two living species have been discovered in Australian rivers. They have lungs so well developed that they can leave the water and breathe in air. In Australia they are called salmon and baramunda. See Dipnoi, and Archipterygium. [ 1913 Webster ]

prop. n. [ NL., gr. Gr. kesto`s girdle + -oid. ] (Zool.) A subclass of parasitic worms of the class Cestoidea. In some classifications, it is not differentiated from the parent class. [ PJC ]

a. (Zool.) Of or pertaining to the Cestoidea. -- n. One of the Cestoidea. [ 1913 Webster ]

n. [ Gr. chai`th hair + &unr_;, &unr_;, tooth. ] (Zool.) A marine fish of the family Chætodontidæ. The chætodonts have broad, compressed bodies, and usually bright colors. [ 1913 Webster ]

a. Of or pertaining to the Chætodonts or the family Chætodontidæ. [ 1913 Webster ]

n. a natural family comprising the butterfly fishes.
Syn. -- family Chaetodontidae. [ WordNet 1.5 ]

n. [ F. or It. custode, fr. L. custos, -odis. ] See Custodian. [ 1913 Webster ]

a. [ Cf. F. custodial, fr. L. custodia. See Custody. ] Relating to custody or guardianship. [ 1913 Webster ]

n. [ From Custody. ] One who has care or custody, as of some public building; a keeper or superintendent. [ 1913 Webster ]

n. Office or duty of a custodian. [ 1913 Webster ]

n. [ Cf. LL. custodiarus. ] A custodian. [ Scot. ] Sir W. Scott. [ 1913 Webster ]

n. [ L. custodia, fr. custos guard; prob. akin to Gr. &unr_;&unr_;&unr_;&unr_;&unr_;&unr_; to hide, and E. hide. Seee Hide to cover. ] 1. A keeping or guarding; care, watch, inspection, for keeping, preservation, or security. [ 1913 Webster ]

A fleet of thirty ships for the custody of the narrow seas. Bacon. [ 1913 Webster ]

2. Judicial or penal safe-keeping. [ 1913 Webster ]

Jailer, take him to thy custody. Shak. [ 1913 Webster ]

3. State of being guarded and watched to prevent escape; restraint of liberty; confinement; imprisonment. [ 1913 Webster ]

What pease will be given
To us enslaved, but custody severe,
And stripes and arbitrary punishment? Milton. [ 1913 Webster ]

n. [ Gr. ky`tos hollow vessel, from &unr_;&unr_;&unr_;&unr_;. See Cyst. ] (Biol.) A nonnucleated mass of protoplasm, the supposed simplest form of independent life differing from the amoeba, in which nuclei are present. [ 1913 Webster ]

‖n. [ Gr. di- = di`s- twice + &unr_; first + 'odoy`s, 'odo`ntos, tooth. ] (Paleon.) An extinct Quaternary marsupial from Australia, about as large as the hippopotamus; -- so named because of its two large front teeth. See Illustration in Appendix. [ 1913 Webster ]

n. [ Ecto- + -derm. ] (Biol.) (a) The outer layer of the blastoderm; epiblast. (b) The external skin or outer layer of an animal or plant, this being formed in an animal from the epiblast. See Illust. of Blastoderm.

{ } a. (Biol.) Of or relating to the ectoderm. [ 1913 Webster ]

n. [ Ento- + Gr. &unr_; skin. ] (Biol.) See Endoderm, and Illust. of Blastoderm.

{ } a. (Biol.) Relating to the entoderm. [ 1913 Webster ]

{ } n. [ Cf. Fantigue. ] State of worry or excitement; fidget; fuss; also, indisposition; pet; sulks. [ Slang ] [ Webster 1913 Suppl. ]

n. [ Gr. &unr_;, &unr_; + E. densimeter. ] Same as Galactometer. [ 1913 Webster ]

n. [ Gr. &unr_; carved, engraved + &unr_;, &unr_;, tooth. See Glyph. ] (Paleon.) An extinct South American quaternary mammal, allied to the armadillos. It was as large as an ox, was covered with tessellated scales, and had fluted teeth. Owen. [ 1913 Webster ]

n. (Paleon.) One of a family (Glyptodontidæ) of extinct South American edentates, of which Glyptodon is the type. About twenty species are known. [ 1913 Webster ]

n. [ Gr. gymno`s naked + E. cytode. ] (Biol.) A cytode without either a cell wall or a nucleus. Haeckel. [ 1913 Webster ]

n. Same as Hemadynamometer. [ 1913 Webster ]

n. An extinct reptile intermediate in form between the therapsids and most primitive true mammals. [ WordNet 1.5 ]

n. An order of extinct reptiles of the Upper Triassic.
Syn. -- order Ictodosauria. [ WordNet 1.5 ]

n. See Keratose. [ 1913 Webster ]

n. [ L. lac, lactis, milk + E. densimeter. ] A form of hydrometer, specially graduated, for finding the density of milk, and thus discovering whether it has been mixed with water or some of the cream has been removed. [ 1913 Webster ]

n. [ Gr. le`wn, le`ontos, lion + 'odoy`s, 'odo`ntos, tooth. Cf. Lion's-tooth, Dandelion. ] (Bot.) A genus of liguliflorous composite plants, including the fall dandelion (Leontodon autumnale), and formerly the true dandelion; -- called also lion's tooth. [ 1913 Webster ]

n. [ Gr. lepto`s small, thin + da`ktylos finger, toe. ] (Zool.) A bird or other animal having slender toes. [ Written also lepodactyle. ] [ 1913 Webster ]

n. [ See leptodactyl. ] A natural family of New World frogs; in some classifications it is essentially coextensive with the family Bufonidae.
Syn. -- family Leptodactylidae. [ WordNet 1.5 ]

a. Having slender toes. [ 1913 Webster ]

n. The type genus of the Leptodactylidae; in some classifications it is placed in the family Bufonidae.
Syn. -- genus Leptodactylus. [ WordNet 1.5 ]

n. [ Gr. masto`s the breast + 'odoy`s, 'odo`ntos, a tooth. So called from the conical projections upon its molar teeth. ] (Paleon.) An extinct genus of mammals closely allied to the elephant, but having less complex molar teeth, and often a pair of lower, as well as upper, tusks, which are incisor teeth. The species were mostly larger than elephants, and their remains occur in nearly all parts of the world in deposits ranging from Miocene to late Quaternary time. [ 1913 Webster ]

‖n. [ NL., fr. E. Mastodon + Gr. say^ros a lizard. ] (Paleon.) A large extinct genus of labyrinthodonts, found in the European Triassic rocks. [ 1913 Webster ]

a. Pertaining to, or resembling, a mastodon; as, mastodontic dimensions. Everett. [ 1913 Webster ]

‖/mhw>, n. [ NL. mastodynia, fr. Gr. masto`s the breast + &unr_; pain. ] (Med.) Pain occuring in the mamma or female breast, -- a form of neuralgia. [ 1913 Webster ]

‖n. pl. [ NL., fr. Gr. &unr_; mucus + &unr_; a bladder. ] (Zool.) A division of Infusoria including the Noctiluca. See Noctiluca. [ 1913 Webster ]

prop. n. pl. (Zool.) A phylum of worms, having a long, round, and generally smooth body; the roundworms. They are mostly parasites, in plants and animals, but some are free-living in soil or water. Also called Nematoidea. [ 1913 Webster +PJC ]

a. (Zool.) Same as Nematoid. [ 1913 Webster ]

n. (Zool.) Any worm of the phylum Nematoda; a roundworm; -- they are unsegmented worms having a cylindrical elongated body. They may live freely in soil or water, or as parasites in plants or animals. [ PJC ]

n. [ Gr. nw^ton the back + 'odoy`s, 'odo`ntos a tooth. ] (Zool.) Any one of several species of bombycid moths belonging to Notodonta, Nerice, and allied genera. The caterpillar of these moths has a hump, or spine, on its back. [ 1913 Webster ]

a. [ L. octodecim eighteen. See Octavo, Decimal, and -mo. ] Having eighteen leaves to a sheet; as, an octodecimo form, book, leaf, size, etc. [ 1913 Webster ]

n.; pl. Octodecimos A book composed of sheets each of which is folded into eighteen leaves; hence; indicating more or less definitely a size of book, whose sheets are so folded; -- usually written 18mo or 18°, and called eighteenmo. [ 1913 Webster ]

a. [ Octo- + dentate. ] Having eight teeth. [ 1913 Webster ]