| EXHILARATORS | • exhilarators n. Plural of exhilarator. • EXHILARATOR n. one who exhilarates. |
| EXOSPHERICAL | • EXOSPHERICAL adj. related to the exosphere, the outermost layer of the earth's atmosphere, also EXOSPHERIC. |
| HEMATOXYLINS | • hematoxylins n. Plural of hematoxylin. • HEMATOXYLIN n. a dye obtained from logwood, also HAEMATOXYLIN. |
| HEXAPLOIDIES | • HEXAPLOIDY n. the state of having six times the normal number of chromosomes. |
| MORPHALLAXIS | • morphallaxis n. (Biology) The regeneration of specific tissue due to loss or death of the existing tissue. • MORPHALLAXIS n. regeneration in a changed form. |
| OXYCEPHALIES | • oxycephalies n. Plural of oxycephaly. • OXYCEPHALY n. the condition of having a conical skull. |
| OXYSULPHIDES | • oxysulphides n. Plural of oxysulphide. • OXYSULPHIDE n. a compound containing an element combined with oxygen and sulphur. |
| PHYLLOTAXIES | • phyllotaxies n. Plural of phyllotaxy. • PHYLLOTAXY n. the arrangement of leaves on a stem and in relation to one another, also PHYLLOTAXIS. |
| PHYTOALEXINS | • phytoalexins n. Plural of phytoalexin. • PHYTOALEXIN n. any substance produced by a plant as a defence against disease. |
| PYRRHULOXIAS | • pyrrhuloxias n. Plural of pyrrhuloxia. • PYRRHULOXIA n. a grey-and-pink crested bunting of Central and SW North America, with a short parrot-like bill. |
| SEXTILLIONTH | • sextillionth adj. The ordinal form of the number one sextillion. • sextillionth n. The person or thing in the sextillionth position. • sextillionth n. One of a sextillion equal parts of a whole. |
| SULPHADOXINE | • sulphadoxine n. Alternative spelling of sulfadoxine. • SULPHADOXINE n. an antibiotic drug of the sulphonamide group, commonly used in combination with pyrimethamine to treat malaria, also SULFADOXINE. |
| TOXOPHILITES | • toxophilites n. Plural of toxophilite. • TOXOPHILITE n. one fond of or expert at archery. |
| TROPHALLAXIS | • trophallaxis n. (Biology) The mutual exchange of (fluid) food between individuals, especially in social insects. • TROPHALLAXIS n. mutual exchange of nutriment in symbiosis. |
| XYLOGRAPHIES | • xylographies n. Plural of xylography. • XYLOGRAPHY n. the art of making engravings on wood, esp. for printing. |
| XYLOPHONISTS | • xylophonists n. Plural of xylophonist. • XYLOPHONIST n. one who plays the xylophone. |