oo·cyst ['ō-ə-,sist] -n
- zygote
- a sporozoan zygote undergoing sporogenous development
oo·cyte ['ō-ə-,sīt] -n
- an egg before maturation : a female gametocyte
OOD -abbr
- officer of the deck
oo·dles ['ü-dᵊlz] -n pl but sing or pl in constr
- a great quantity : lot
oog·a·mous [ō-'ä-gə-məs] -adj, n
- having or involving a small motile male gamete and a large immobile female gamete
oo·gen·e·sis [,ō-ə-'je-nə-səs] -n, adj
- formation and maturation of the egg
oo·go·ni·um [,ō-ə-'gō-nē-əm] -n, adj
- a female sexual organ in various algae and fungi that corresponds to the archegonium of ferns and mosses
- a descendant of a primordial germ cell that gives rise to oocytes
ooh ['ü] -interj
- used to express amazement, joy, or surprise
- to exclaim in amazement, joy, or surprise
- ooh ing and aahing over the new automobiles
oo·lite ['ō-ə-,līt] -n, adj
- a rock consisting of small round grains usu. of calcium carbonate cemented together
ool·o·gist [ō-'ä-lə-jist] -n
- a person specializing in the study of birds' eggs
- a collector of birds' eggs
oo·long ['ü-,lȯŋ] -n
- tea made from leaves that have been partially fermented before firing
oom·pah ['üm-(,)pä, 'u̇m-] -n, vb
- a repeated rhythmic bass accompaniment esp. in a band
- music featuring such accompaniment
oomph ['u̇m(p)f] -n
- personal charm or magnetism : glamour
- sex appeal
- punch, vitality
oo·pho·rec·to·my [,ō-ə-fə-'rek-tə-mē] -n
- the surgical removal of an ovary called also ovariectomy
oops ['(w)u̇(ə)ps] -interj
- used typically to express mild apology, surprise, or dismay
Oort cloud ['ȯrt-] -n
- a spherical shell of cometary bodies believed to surround the sun far beyond the orbit of Pluto and from which some are dislodged when perturbed (as by a passing star) to fall toward the sun
oo·spore ['ō-ə-,spȯr] -n
- a spore (as of a fungus) produced by heterogamous fertilization
oo·the·ca [,ō-ə-'thē-kə] -n, adj
- a firm-walled and distinctive egg case (as of a cockroach)
oo·tid ['ō-ə-,tid] -n
- an egg cell after meiosis
ooze ['üz] -n
- a soft deposit (as of mud, slime, or shells) on the bottom of a body of water
- a piece of soft wet plastic ground
- to pass or flow slowly through or as if through small openings or interstices
- to move slowly or imperceptibly
- the crowd began to ooze forward -- Bruce Marshall
- to exude moisture
- to exude something often in a faintly repellent manner
- to emit slowly
- exude
- a decoction of vegetable material used for tanning leather
- the act of oozing
- something that oozes
oozy ['ü-zē] -adj
- containing or composed of ooze : resembling ooze
- exuding moisture : slimy