| CHALCEDONYX | • chalcedonyx n. (Mineralogy) An agate formed of a white opaque chalcedony alternating with a greyish translucent chalcedony. • CHALCEDONYX n. an agate of alternating white opaque and greyish transparent chalcedony. |
| CHICKABIDDY | • chickabiddy n. (Childish) A chicken or similar bird. • chickabiddy n. Term of endearment for a young child or loved one. • CHICKABIDDY n. a term of endearment. |
| CHURCHYARDS | • churchyards n. Plural of churchyard. • church-yards n. Plural of church-yard. • CHURCHYARD n. a yard that belongs to a church and is often used as a burial ground. |
| CYCADOPHYTE | • cycadophyte n. (Botany) Any plant of the division Cycadophyta; a cycad. • CYCADOPHYTE n. any of a division of usually unbranched mostly extinct gymnosperms. |
| DIPHYCERCAL | • diphycercal adj. (Zoology) Describing a symmetric tail fin in which the vertebral column extends to the tip. • DIPHYCERCAL adj. of fishes, etc., having the tail symmetrical about the vertebral column. |
| HYDNOCARPIC | • HYDNOCARPIC adj. denoting a type of acid. |
| HYDROCRACKS | • hydrocracks v. Third-person singular simple present indicative form of hydrocrack. • HYDROCRACK v. to crack hydrocarbons in the presence of hydrogen. |
| HYDROCYANIC | • hydrocyanic adj. Of or pertaining to hydrocyanic acid or its compounds. • HYDROCYANIC adj. denoting an acid (prussic acid) composed of hydrogen and cyanogen. |
| HYDROTACTIC | • hydrotactic adj. Relating to hydrotaxis. • HYDROTACTIC adj. relating to hydrotaxis, movement towards or away from water. |
| PACHYDACTYL | • PACHYDACTYL adj. having thick digits, also PACHYDACTYLOUS. |
| PACHYDERMIC | • pachydermic adj. (Medicine) Characterized by or characteristic of pachydermy. • pachydermic adj. Pertaining to the obsolete taxonomic order Pachydermata. • pachydermic adj. Pertaining to or involving elephants. |
| TACHYCARDIA | • tachycardia n. A rapid resting heart rate, especially one above 100 beats per minute. • TACHYCARDIA n. quick heart-rate. |