| ANTHOPHYLLITE | • anthophyllite n. (Mineralogy) A dark brown amphibole mineral; a mixed silicate of iron and magnesium. • ANTHOPHYLLITE n. an orthorhombic ferromagnesian amphibole which occurs usually as fibrous or asbestiform masses. |
| BENTHOPELAGIC | • benthopelagic adj. Both benthic and pelagic. • benthopelagic n. Any such organism. • BENTHOPELAGIC adj. living just above the seabed. |
| MYTHOPOETICAL | • mythopoetical adj. (Mythology) Pertaining to the creation of myths; pertaining to mythopoiesis. • MYTHOPOETICAL adj. relating to mythopoeia. |
| ORNITHOPHOBIA | • ornithophobia n. Fear of birds. • ORNITHOPHOBIA n. fear of birds. |
| ORTHOPAEDICAL | • orthopaedical adj. Pertaining to orthopaedics; characteristic of orthopaedia. • orthopædical adj. Obsolete typography of orthopedical. • ORTHOPAEDICAL adj. relating to orthopaedics, also ORTHOPAEDIC, ORTHOPEDIC. |
| ORTHOPAEDISTS | • orthopaedists n. Plural of orthopaedist. • ORTHOPAEDIST n. a specialist in orthopaedy, also ORTHOPEDIST. |
| ORTHOPINAKOID | • ORTHOPINAKOID n. in monoclinic crystals, a form consisting of two faces parallel to the orthodiagonal and the vertical axis. |
| ORTHOPTERISTS | • orthopterists n. Plural of orthopterist. • ORTHOPTERIST n. a student of insects. |
| ORTHOPTEROIDS | • orthopteroids n. Plural of orthopteroid. • ORTHOPTEROID n. a member of the Orthoptera, cockroaches. |
| ORTHOPYROXENE | • orthopyroxene n. (Mineralogy) Any pyroxene that forms orthorhombic crystals. • ORTHOPYROXENE n. a member of the pyroxene group of minerals having an orthorhombic crystal structure, such as enstatite and hypersthene. |
| TRIMETHOPRIMS | • trimethoprims n. Plural of trimethoprim. • TRIMETHOPRIM n. a synthetic antibacterial and antimalarial drug used alone or in combination with sulfamethoxazole. |
| XANTHOPTERINE | • xanthopterine n. Alternative form of xanthopterin. • XANTHOPTERINE n. a yellow pigment obtainable from the wings of yellow butterflies and the urine of mammals, also XANTHOPTERIN. |
| XANTHOPTERINS | • xanthopterins n. Plural of xanthopterin. • XANTHOPTERIN n. a yellow pigment obtainable from the wings of yellow butterflies and the urine of mammals, also XANTHOPTERINE. |