| HETEROTOPOUS | • heterotopous adj. Exhibiting heterotopy. • HETEROTOPOUS adj. relating to heterotopy, displacement of an organ of the body, also HETEROTOPIC. |
| OCTOPETALOUS | • octopetalous adj. (Botany) Having eight petals. • OCTOPETALOUS adj. having eight petals. |
| ORTHOPTEROID | • orthopteroid n. (Entomology) Any of the insects historically included in the order Orthoptera, including the cockroaches… • ORTHOPTEROID n. a member of the Orthoptera, cockroaches. |
| ORTHOPTEROUS | • orthopterous adj. (Zoology) Belonging to the Orthoptera. • ORTHOPTEROUS adj. pertaining or belonging to insect order including grasshoppers, crickets, etc. |
| ORTHOTROPIES | • ORTHOTROPY n. the state of being orthotropic, growing along a vertical axis. |
| OSTEOPOROTIC | • osteoporotic adj. Relating to osteoporosis. • OSTEOPOROTIC adj. relating to osteoporosis. |
| PHOTOCATHODE | • photocathode n. (Physics) A cathode that emits electrons when exposed to light. • PHOTOCATHODE n. a cathode that emits electrons when exposed to radiant energy and esp. light. |
| PHOTOMONTAGE | • photomontage n. (Photography) A composite image combining two or more photographs. • photomontage n. (Photography) The art of constructing such images. • PHOTOMONTAGE n. montage using photographic images. |
| PHOTONEUTRON | • photoneutron n. (Physics) Any neutron produced by a photonuclear reaction. • PHOTONEUTRON n. a neutron emitted from a nucleus as a result of photodisintegration. |
| PHOTOTONUSES | • PHOTOTONUS n. the sensitivity of a living organism to light. |
| PHOTOTROPIES | • PHOTOTROPY n. change of colour due to wavelength of incident light. |
| POTAMOGETONS | • potamogetons n. Plural of potamogeton. • POTAMOGETON n. a plant of the pondweed genus of water plants, with floating and submerged leaves. |
| TROPHOZOITES | • trophozoites n. Plural of trophozoite. • TROPHOZOITE n. in Protozoa, the trophic phase of an adult. |