| MORPHOTROPIC | • morphotropic adj. (Crystallography) Of or pertaining to morphotropism. • morphotropic adj. Describing a phase transition due to a change in composition. • morphotropic adj. Describing the phase boundary between tetragonal and rhombohedral regions of a ferroelectric. |
| PHOTOCOPIERS | • photocopiers n. Plural of photocopier. • PHOTOCOPIER n. a machine for copying. |
| PHOTOCOPYING | • photocopying v. Present participle of photocopy. • photocopying n. The process by which photocopies are made. • PHOTOCOPYING n. the act of making a photocopy. |
| PHOTOPERIODS | • photoperiods n. Plural of photoperiod. • PHOTOPERIOD n. the period during every 24 hours when an organism is exposed to daylight. |
| PHOTOPHILOUS | • photophilous adj. Thriving in the presence of light. • PHOTOPHILOUS adj. light-loving, turning towards the light, also PHOTOPHILIC. |
| PHOTOPHOBIAS | • photophobias n. Plural of photophobia. • PHOTOPHOBIA n. the morbid fear of light. |
| PHOTOPHONIES | • PHOTOPHONY n. the art or practice of using the photophone. |
| PHOTOTROPHIC | • phototrophic adj. (Biology) That exhibits phototrophy. • PHOTOTROPHIC adj. relating to phototropism, movement directed by light. |
| PHOTOTROPIES | • PHOTOTROPY n. change of colour due to wavelength of incident light. |
| PHOTOTROPISM | • phototropism n. (Biology) The movement of a plant towards or away from light. • PHOTOTROPISM n. movement directed by light. |
| PROTOMORPHIC | • protomorphic adj. (Biology) Having the most primitive character; in the earliest form. • PROTOMORPHIC adj. primordial; primitive. |
| PROTOTROPHIC | • prototrophic adj. (Biology) Of or pertaining to a prototroph or to prototrophy. • PROTOTROPHIC adj. of bacteria, feeding directly on uncombined elements. |
| SCOPTOPHOBIA | • SCOPTOPHOBIA n. fear of being looked at, also SCOPOPHOBIA. |
| TROPHOTROPIC | • trophotropic adj. Relating to trophotropy. • TROPHOTROPIC adj. related to trophotropism, direction of growth by nutritional factors. |
| TROPOPHILOUS | • tropophilous adj. (Biology) Adapted to seasonal changes. • TROPOPHILOUS adj. flourishing in seasonal extremes of climate. |