| NONPOISONOUS | • nonpoisonous adj. Not poisonous. • non-poisonous adj. Alternative spelling of nonpoisonous. • NONPOISONOUS adj. not poisonous. |
| ODONTOPHOBIA | • odontophobia n. An irrational fear of dentistry. • ODONTOPHOBIA n. the fear of teeth. |
| ONOMATOPOEIA | • onomatopoeia n. (Uncountable) The property of a word of sounding like what it represents. • onomatopoeia n. (Countable) A word that sounds like what it represents, such as "gurgle," "stutter," or "hiss". • onomatopoeia n. (Uncountable, rhetoric) The use of language whose sound imitates that which it names. |
| ONOMATOPOEIC | • onomatopoeic adj. Of or relating to onomatopoeia. • onomatopoeic adj. Having the property of onomatopoeia. • onomatopœic adj. Alternative spelling of onomatopoeic. |
| OPISTHODOMOI | • opisthodomoi n. Plural of opisthodomos. • OPISTHODOMOS n. (Greek) a portico or apartment at the back of an ancient Greek or Roman temple. |
| OPISTHODOMOS | • opisthodomos n. (Greek architecture) A porch at the rear of a temple, set against the blank back wall of the cella. • OPISTHODOMOS n. (Greek) a portico or apartment at the back of an ancient Greek or Roman temple. |
| OPISTHOTONOS | • opisthotonos n. (Medicine) Sustained tetanic spasm in which the body is bent backwards and stiffened, as produced by various diseases. • OPISTHOTONOS n. extreme arching backwards of the spine and neck as a result of spasm of the muscles in that region, etc. |
| OSTEOPOROSIS | • osteoporosis n. (Pathology) A disease, occurring especially in women following menopause, in which the bones become… • OSTEOPOROSIS n. development of a porous structure in bone due to loss of calcium, resulting in brittleness. |
| OSTEOPOROTIC | • osteoporotic adj. Relating to osteoporosis. • OSTEOPOROTIC adj. relating to osteoporosis. |
| PHOTOBIOLOGY | • photobiology n. The study of the effects of light on living organisms, and on biological processes. • PHOTOBIOLOGY n. the study of the effects of light on organisms. |
| PODOCONIOSES | • PODOCONIOSIS n. endemic elephantiasis of the lower legs. |
| PODOCONIOSIS | • podoconiosis n. (Pathology) An endemic form of nonfilarial elephantiasis. • PODOCONIOSIS n. endemic elephantiasis of the lower legs. |
| POGONOTOMIES | • POGONOTOMY n. shaving. |
| PROSOPOPOEIA | • prosopopoeia n. (Rhetoric) An act of personifying a person or object when communicating to an audience; a figure of… • prosopopoeia n. Personification of an abstraction. • prosopopœia n. Obsolete typography of prosopopoeia. |