Of or pertaining to oolite; composed of, or resembling, oolite.

Of or pertaining to oology.

One versed in oology.

The science of eggs in relation to their coloring, size, shape, and number.

A fragrant variety of black tea having somewhat the flavor of green tea.

A long, broad boat used by the Eskimos.

One.

Once.

To bind with a thread or cord; to join; to unite.

A kind of black tea.

An alternately produced form of certain cryptogamous plants, as ferns, mosses, and the like, which bears antheridia and archegonia, and so has sexual fructification, as contrasted with the sporophore, which is nonsexual, but produces spores in countless number. In ferns the oophore is a minute prothallus; in mosses it is the leafy plant.

Ovariotomy.

Having the nature of, or belonging to, an oophore.

The macrosporangium or case for the larger kind of spores in heterosporous flowerless plants.

Ovaritis.

Any plant of a proposed class or grand division (collectively termed oophytes or Oophyta), which have their sexual reproduction accomplished by motile antherozoids acting on oospheres, either while included in their oogonia or after exclusion.

Of or pertaining to an oophyte.

A wild, bearded sheep inhabiting the Ladakh mountains. It is reddish brown, with a dark beard from the chin to the chest.

The ovum, after fusion with the spermatozoon in impregnation.

An oogonium; also, a case containing oval or rounded spores of some other kind than oospores.

A special kind of spore resulting from the fertilization of an oosphere by antherozoids. A fertilized oosphere in the ovule of a flowering plant.

Of or pertaining to an oospore.

One of the plates which in some Crustacea inclose a cavity wherein the eggs are hatched.

An egg case, especially those of many kinds of mollusks, and of some insects, as the cockroach. Cf. Ooecium.

A half oviparous, or an oviparous, mammal; a marsupial or monotreme.

The part of the oviduct of certain trematode worms in which the ova are completed and furnished with a shell.

To cause to ooze.

leaking out slowly.

Same as Acrita.

Miry; containing soft mud; resembling ooze; as, the oozy bed of a river.

To darken; to cloud.

The state of being opaque; the quality of a body which renders it impervious to the rays of light; want of transparency; opaqueness.

Opaque.

Opaque.

A large oceanic fish (Lampris guttatus), inhabiting the Atlantic Ocean. It is remarkable for its brilliant colors, which are red, green, and blue, with tints of purple and gold, covered with round silvery spots. Called also king of the herrings.

See Opaque.

A mineral consisting, like quartz, of silica, but inferior to quartz in hardness and specific gravity.

To give forth a play of colors, like the opal.

A reflection of a milky or pearly light from the interior of a mineral, as in the moonstone; the state or quality of being opalescent.

Reflecting a milky or pearly light from the interior; having an opaline play of colors.

An opaline variety of yellow chalcedony.

To convert into opal, or a substance like opal.

A picture taken on /milky/ glass.

That which is opaque; opacity.

The state or quality of being impervious to light; opacity.

To open.

An instrument, consisting of a tube having one end open and the other end covered with a thin flexible membrance to the center of which is attached a small mirror. It is used for exhibiting upon a screen, by means of rays reflected from the mirror, the vibratory motions caused by sounds produced at the open end of the tube, as by speaking or singing into it.

A bright-colored European actinian (Anemonia sulcata, syn. Anthea sulcata); -- so called because it does not retract its tentacles.

To unclose; to form a hole, breach, or gap; to be unclosed; to be parted.

Taking place in the open air; outdoor; as, an open-air game or meeting.

not cyclic; having no rings of atoms within the molecular structure; having an open chain structure. Opposite of cyclic.

not buttoned at the neck; -- of a shirt; as, dressed casually in shorts and an open-collared shirt.

allowing for a spontaneous response; as, an open-ended question. Contrasted to multiple-choice.

With eyes widely open; alert to possible danger; watchful; vigilant.

Generous; liberal; munificent.

Bareheaded.

Candid; frank; generous.

Ready to entertain new ideas. Contrasted with closed-minded.

Having the mouth open; gaping; hence, greedy; clamorous.

A bird of the genus Anastomus, allied to the stork; -- so called because the two parts of the bill touch only at the base and tip. One species inhabits India, another Africa. Called also open-beak. See Illust. (m), under Beak.

worked from the exposed surface; -- of mines and mining; as, opencut mining.

having the covering skin pulled back; -- used of mouth or eyes; as, his mouth slightly opened. Opposite of closed.

One who, or that which, opens.

The act or process of opening; a beginning; commencement; first appearance; as, the opening of a speech.

In an open manner; publicly; not in private; without secrecy.

The quality or state of being open.

Anything so constructed or manufactured (in needlework, carpentry, metal work, etc.) as to show openings through its substance; work that is perforated or pierced.

A large African forest tree (Nauclea diderrichii) yielding a strong hard yellow to golden brown lumber; sometimes placed in genus Sarcocephalus, and then called Sarcocephalus diderrichii.

A drama, either tragic or comic, of which music forms an essential part; a drama wholly or mostly sung, consisting of recitative, arias, choruses, duets, trios, etc., with orchestral accompaniment, preludes, and interludes, together with appropriate costumes, scenery, and action; a lyric drama.

Practicable.

An instrument or machine for measuring work done, especially for ascertaining the number of rotations made by a machine or wheel in manufacturing cloth; a counter.

The act of operating or working; operation.

The symbol, quantity, or thing upon which a mathematical operation is performed; -- called also faciend.

Operative. An operative person or thing.

A process for causing animals to behave in a specific manner by rewarding or punishing the animal each time it performs a certain act; after a time, the animal comes to associate the reward or punishment with the act, and will increase or decrease the frequency of performing that act.

To produce, as an effect; to cause.

Of or pertaining to the opera or to operas; characteristic of, suitable for, or resembling, the opera; as, an operatic voice.

pr. p. of operate; as, the operating conditions of the oxidation pond.

The act or process of operating; agency; the exertion of power, physical, mechanical, or moral.

of or pertaining to operations; as, operational procedure.

the doctrine that the meaning of a proposition consists of the operations involved in defining, proving, or applying it.

Of or pertaining to operationalism.

financial transactions at a brokerage; having to do with the execution of trades and keeping customer records.

A skilled worker; an artisan; esp., one who operates a machine in a mill or manufactory.

In an operative manner.

One who, or that which, operates or produces an effect.

A laboratory.

Any one of the bony plates which support the gill covers of fishes; an opercular bone.

See Operculum.

The principal opercular bone or operculum of fishes.

Closed by a lid or cover, as the capsules of the mosses.

Bearing an operculum.

Having the form of a lid or cover.

Producing an operculum; -- said of the foot, or part of the foot, of certain mollusks.

The lid of a pitcherform leaf. The lid of the urnlike capsule of mosses.

A short, light, musical drama.

Wrought with labor; requiring labor; hence, tedious; wearisome.

Laboriousness.

Operose.

Concealed; private.

Open time; -- applied to different things The early spring, or the time when flowers begin opening. The time between Epiphany and Ash Wednesday wherein marriages were formerly solemnized publicly in churches. The time after harvest when the common fields are open to all kinds of stock.

Of, pertaining to, or designating, a substance (called ophelic acid) extracted from a plant (Ophelia) of the Gentian family as a bitter yellowish sirup, used in India as a febrifuge and tonic.

A large brass wind instrument, formerly used in the orchestra and in military bands, having a loud tone, deep pitch, and a compass of three octaves; -- now generally supplanted by bass and contrabass tubas. It developed from the older wooden instrument called the serpent.

The suborder of reptiles which includes the serpents; called also Serpentes.

Of or pertaining to the Ophidia; belonging to serpents.

Of or pertaining to the Ophidiidae, a family of fishes which includes many slender species. One of the Ophidiidae.

The typical genus of ophidioid fishes. [Written also Ophidium.] See Illust. under Ophidioid.

Ophidian.

A natural family of fishes closely related to greenlings (fish of the genus Hexagrammos).

A natural family of succulent ferns cosmopolitan in distribution.

An order coextensive with the family Ophioglossaceae.

The worship of serpents.

Of or pertaining to ophiology.

One versed in the natural history of serpents.

That part of natural history which treats of the ophidians, or serpents.

Divination by serpents, as by their manner of eating, or by their coils.

An order of tailless amphibians having a slender, wormlike body with regular annulations, and usually with minute scales imbedded in the skin. The limbs are rudimentary or lacking. It includes the caecilians. Called also Gymnophiona and Ophidobatrachia.

An ammonite.

Having the form of a serpent.

Feeding on serpents; -- said of certain birds and reptiles.