Oo (n.) A beautiful bird (Moho nobilis) of the Hawaiian Islands. It yields the brilliant yellow feathers formerly used in making the royal robes. Called also yellow-tufted honeysucker.
Ooecia (pl. ) of Ooecium
Ooecium (n.) One of the special zooids, or cells, of Bryozoa, destined to receive and develop ova; an ovicell. See Bryozoa.
Oogenesis (n.) The development, or mode of origin, of the ova.
Oogonia (pl. ) of Oogonium
Oogoniums (pl. ) of Oogonium
Oogonium (n.) A special cell in certain cryptogamous plants containing oospheres, as in the rockweeds (Fucus), and the orders Vaucherieae and Peronosporeae.
Ooidal (a.) Shaped like an egg.
Ook (n.) Oak.
Oolite (n.) A variety of limestone, consisting of small round grains, resembling the roe of a fish. It sometimes constitutes extensive beds, as in the European Jurassic. See the Chart of Geology.
Oolitic (a.) Of or pertaining to oolite; composed of, or resembling, oolite.
Oological (a.) Of or pertaining to oology.
Oologist (n.) One versed in oology.
Oology (n.) The science of eggs in relation to their coloring, size, shape, and number.
Oolong (n.) A fragrant variety of black tea having somewhat the flavor of green tea.
Oomiac (n.) Alt. of Oomiak
Oomiak (n.) A long, broad boat used by the Eskimos.
Oon (a.) One.
Oones (adv.) Once.
Oop (v. t.) To bind with a thread or cord; to join; to unite.
Oopack (n.) Alt. of Oopak
Oopak (n.) A kind of black tea.
Oophore (n.) 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.
Oophorectomy (n.) Ovariotomy.
Oophoric (a.) Having the nature of, or belonging to, an oophore.
Oophorida (pl. ) of Oophoridium
Oophoridiums (pl. ) of Oophoridium
Oophoridium (n.) The macrosporangium or case for the larger kind of spores in heterosporous flowerless plants.
Oophoritis (n.) Ovaritis.
Oophyte (n.) 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.
Oophytic (a.) Of or pertaining to an oophyte.
Oorial (n.) A wild, bearded sheep inhabiting the Ladakh mountains. It is reddish brown, with a dark beard from the chin to the chest.
Oosperm (n.) The ovum, after fusion with the spermatozoon in impregnation.
Oospere (n.) An unfertilized, rounded mass of protoplasm, produced in an oogonium.
Oospere (n.) An analogous mass of protoplasm in the ovule of a flowering plant; an embryonic vesicle.
Oosporangia (pl. ) of Oosporangium
Oosporangiums (pl. ) of Oosporangium
Oosporangium (n.) An oogonium; also, a case containing oval or rounded spores of some other kind than oospores.
Oospore (n.) A special kind of spore resulting from the fertilization of an oosphere by antherozoids.
Oospore (n.) A fertilized oosphere in the ovule of a flowering plant.
Oosporic (a.) Of or pertaining to an oospore.
Oostegite (n.) One of the plates which in some Crustacea inclose a cavity wherein the eggs are hatched.
Oothecae (pl. ) of Ootheca
Ootheca (n.) An egg case, especially those of many kinds of mollusks, and of some insects, as the cockroach. Cf. Ooecium.
Ootooid (n.) Alt. of Ootocoid
Ootocoid (n.) A half oviparous, or an oviparous, mammal; a marsupial or monotreme.
Ootype (n.) The part of the oviduct of certain trematode worms in which the ova are completed and furnished with a shell.
Ooze (n.) Soft mud or slime; earth so wet as to flow gently, or easily yield to pressure.
Ooze (n.) Soft flow; spring.
Ooze (n.) The liquor of a tan vat.
Oozed (imp. & p. p.) of Ooze
Oozing (p. pr. & vb. n.) of Ooze
Ooze (n.) To flow gently; to percolate, as a liquid through the pores of a substance or through small openings.
Ooze (n.) Fig.: To leak (out) or escape slowly; as, the secret oozed out; his courage oozed out.
Ooze (v. t.) To cause to ooze.
Oozoa (n. pl.) Same as Acrita.
Oozy (a.) Miry; containing soft mud; resembling ooze; as, the oozy bed of a river.
Opacate (v. t.) To darken; to cloud.
Opacity (n.) The state of being opaque; the quality of a body which renders it impervious to the rays of light; want of transparency; opaqueness.
Opacity (n.) Obscurity; want of clearness.
Opacous (a.) Opaque.
Opacular (a.) Opaque.
Opah (n.) A large oceanic fish (Lampris quttatus), 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.
Opake (a.) See Opaque.
Opal (n.) A mineral consisting, like quartz, of silica, but inferior to quartz in hardness and specific gravity.
Opalesced (imp. & p. p.) of Opalesce
Opalescing (p. pr. & vb. n.) of Opalesce
Opalesce (v. i.) To give forth a play of colors, like the opal.
Opalescence (n.) 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.
Opalescent (a.) Reflecting a milky or pearly light from the interior; having an opaline play of colors.
Opaline (a.) Of, pertaining to, or like, opal in appearance; having changeable colors like those of the opal.
Opalized (imp. & p. p.) of Opalize
Opalizing (p. pr. & vb. n.) of Opalize
Opalize (v. t.) To convert into opal, or a substance like opal.
Opalotype (n.) A picture taken on "milky" glass.
Opaque (a.) Impervious to the rays of light; not transparent; as, an opaque substance.
Opaque (a.) Obscure; not clear; unintelligible.
Opaque (n.) That which is opaque; opacity.
Opaqueness (n.) The state or quality of being impervious to light; opacity.
Ope (a.) Open.
Ope (v. t. & i.) To open.
Opeidoscope (n.) 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.
Opelet (n.) A bright-colored European actinian (Anemonia, / Anthea, sulcata); -- so called because it does not retract its tentacles.
Open (a.) Free of access; not shut up; not closed; affording unobstructed ingress or egress; not impeding or preventing passage; not locked up or covered over; -- applied to passageways; as, an open door, window, road, etc.; also, to inclosed structures or objects; as, open houses, boxes, baskets, bottles, etc.; also, to means of communication or approach by water or land; as, an open harbor or roadstead.
Open (a.) Free to be used, enjoyed, visited, or the like; not private; public; unrestricted in use; as, an open library, museum, court, or other assembly; liable to the approach, trespass, or attack of any one; unprotected; exposed.
Open (a.) Free or cleared of obstruction to progress or to view; accessible; as, an open tract; the open sea.
Open (a.) Not drawn together, closed, or contracted; extended; expanded; as, an open hand; open arms; an open flower; an open prospect.
Open (a.) Without reserve or false pretense; sincere; characterized by sincerity; unfeigned; frank; also, generous; liberal; bounteous; -- applied to personal appearance, or character, and to the expression of thought and feeling, etc.
Open (a.) Not concealed or secret; not hidden or disguised; exposed to view or to knowledge; revealed; apparent; as, open schemes or plans; open shame or guilt.
Open (a.) Not of a quality to prevent communication, as by closing water ways, blocking roads, etc.; hence, not frosty or inclement; mild; -- used of the weather or the climate; as, an open season; an open winter.
Open (a.) Not settled or adjusted; not decided or determined; not closed or withdrawn from consideration; as, an open account; an open question; to keep an offer or opportunity open.
Open (a.) Free; disengaged; unappropriated; as, to keep a day open for any purpose; to be open for an engagement.
Open (a.) Uttered with a relatively wide opening of the articulating organs; -- said of vowels; as, the an far is open as compared with the a in say.
Open (a.) Uttered, as a consonant, with the oral passage simply narrowed without closure, as in uttering s.
Open (a.) Not closed or stopped with the finger; -- said of the string of an instrument, as of a violin, when it is allowed to vibrate throughout its whole length.
Open (a.) Produced by an open string; as, an open tone.
Open (n.) Open or unobstructed space; clear land, without trees or obstructions; open ocean; open water.
Opened (imp. & p. p.) of Open
Opening (p. pr. & vb. n.) of Open
Open (v. t.) To make or set open; to render free of access; to unclose; to unbar; to unlock; to remove any fastening or covering from; as, to open a door; to open a box; to open a room; to open a letter.