omnivorous | a. eating both plant and animal food; devouring everything; having interest in a variety of subjects |
on track | a. proceeding as planned, as expected, or in a manner consistent with an established pattern |
onerous | a. burdensome or oppressive; not easily borne; wearing |
onlooker | n. one that looks on; spectator |
onslaught | n. violent attack; sudden and severe onset of trouble |
onus | n. burden or obligation; difficult or disagreeable responsibility or necessity |
opalescent | a. varying in color when seen in different lights or from different angles; lustrous |
opaque | a. impenetrable by light; not transparent; not reflecting light; having no luster |
opiate | n. medicine to induce sleep or deaden pain; something that relieves emotions or causes inaction |
opprobrious | a. bringing disgrace; shameful or infamous |
opulence | n. extreme wealth; luxuriousness; abundance |
oracular | a. prophetic; uttered as if with divine authority; mysterious or ambiguous |
oration | n. elaborate discourse; delivered in public; treating an important subject in a formal and dignified manner |
oratorio | n. musical composition for voices and orchestra based on religious text |
oratory | n. place of orisons, or prayer; chapel or small room set apart for private devotions |
ordain | v. decree or command; grant holy orders; predestine |
ordination | n. act of admitting to holy orders; disposition as in ranks or rows; formal arrangement |
ornithology | n. branch of zoology that deals with the study of birds |
oscillate | v. swing back and forth with a steady, uninterrupted rhythm; vibrate pendulum like; waver |
ossify | v. change or form into bone; become set in a rigidly conventional pattern; change from soft tissue to hard bony tissue |
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