| MORPHOTROPY | • MORPHOTROPY n. the effect on crystalline form of the addition or substitution of an element or radical. |
| PHOTOCOPIER | • photocopier n. A machine which reproduces documents by photographing the original over a glass plate and printing duplicates. • PHOTOCOPIER n. a machine for copying. |
| PHOTOPERIOD | • photoperiod n. (Biology) The normal duration of natural daylight experienced by an organism; daylength. • PHOTOPERIOD n. the period during every 24 hours when an organism is exposed to daylight. |
| PHOTOPHORES | • photophores n. Plural of photophore. • PHOTOPHORE n. a luminiferous organ. |
| PHOTOTROPES | • PHOTOTROPE n. a substance exhibiting phototropism, movement directed by light. |
| PHOTOTROPHS | • phototrophs n. Plural of phototroph. • PHOTOTROPH n. a plant which uses light to generate energy needed to absorb nutrients. |
| PHOTOTROPIC | • phototropic adj. Having a tendency to move in response to light. An animal or microbe that is positively phototropic… • PHOTOTROPIC adj. relating to phototropism, movement directed by light. |
| PORNOTOPIAN | • pornotopian adj. Of or relating to pornotopia. • PORNOTOPIAN adj. relating to a pornotopia, a perfect setting for the antics of pornography. |
| PORNOTOPIAS | • pornotopias n. Plural of pornotopia. • PORNOTOPIA n. a perfect setting for the antics of pornography. |
| PROCTOSCOPE | • proctoscope n. A tube-like instrument, equipped with a light, used to examine the rectum; a rectoscope. • PROCTOSCOPE n. an instrument for examining the rectum. |
| PROCTOSCOPY | • proctoscopy n. The examination of the anal cavity, rectum or sigmoid colon by means of a proctoscope. • PROCTOSCOPY n. examination by use of a proctoscope, an instrument for examining the rectum. |
| PROMPTBOOKS | • promptbooks n. Plural of promptbook. • PROMPTBOOK n. a copy of a play for a prompter. |
| PROPHETHOOD | • prophethood n. State or condition of being a prophet. • PROPHETHOOD n. the state of being a prophet. |
| PROPORTIONS | • proportions n. Plural of proportion. • proportions n. (Informal) A person’s figure. • proportions n. (Flags) The measurements of a flag, described using a ratio. |
| PROPOSITION | • proposition n. (Uncountable) The act of offering (an idea) for consideration. • proposition n. (Countable) An idea or a plan offered. • proposition n. (Countable, business settings) The terms of a transaction offered. |
| PROPROCTORS | • proproctors n. Plural of proproctor. • PROPROCTOR n. an assistant proctor. |
| PROTOPHLOEM | • protophloem n. The form of phloem that is initially formed, composed of narrow, thin-walled cells. • PROTOPHLOEM n. the first-formed phloem that develops from procambium, usually associated with a region of rapid growth. |
| PROTOTROPHS | • prototrophs n. Plural of prototroph. • PROTOTROPH n. a bacterium feeding only on inorganic matter. |
| PROTOTROPHY | • prototrophy n. The condition of being a prototroph. • PROTOTROPHY n. the state of being prototrophic. |