| exossation | A depriving of bone or of fruit stones. Source: Websters Dictionary (01 Mar 1998) |
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| exosstate | To deprive of bones; to take out the bones of; to bone. Origin: L. Exossatus, p. P. Of exossare to bone, fr. Exos without bones; ex out + os, ossis, bone. Source: Websters Dictionary (01 Mar 1998) |
| exostectomy | Removal of an exostosis. Synonym: exostosectomy. Origin: exostosis + G. Ektome, excision (05 Mar 2000) |
| exostome | <botany> The small aperture or foremen in the outer coat of the ovule of a plant. Origin: Exo- + Gr. Mouth:cf. F. Exostome. Source: Websters Dictionary (01 Mar 1998) |
| exostosectomy | Removal of an exostosis. Synonym: exostosectomy. Origin: exostosis + G. Ektome, excision (05 Mar 2000) |
| exostoses | A disorder where there are noncancerous lumps or growths within the ear canal or on the pinna of the ear (external ear). most lumps are sebaceous cysts but some are bony overgrowths known as exostoses (or osteomas). If large enough they may interfere with hearing. In this case surgical removal may be required. (27 Sep 1997) |
| exostoses, multiple hereditary | Hereditary disorder transmitted by an autosomal dominant gene and characterised by multiple exostoses (multiple osteochondromas) near the ends of long bones. The genetic abnormality results in a defect in the osteoclastic activity at the metaphyseal ends of the bone during the remodeling process in childhood or early adolescence. The metaphyses develop benign, bony outgrowths often capped by cartilage. A small number undergo neoplastic transformation. (12 Dec 1998) |
| exostosis | A non cancerous growth on the surface of a bone, usually with a cartilage cap, that is due to long-term irritation as a result of osteoarthritis, infections, or trauma. (09 Oct 1997) |
| exostosis bursata | An exostosis arising from the joint surface of a bone and covered with cartilage and a synovial sac. (05 Mar 2000) |
| exostosis cartilaginea | An ossified chondroma arising from the epiphysis or joint surface of a bone. (05 Mar 2000) |
| exoteric | Of external origin; arising outside the organism. Origin: G. Exoterikos, outer (05 Mar 2000) |
| exoteric bacterium | A bacterium that secretes an exotoxin. (05 Mar 2000) |
| exotheca | <zoology> The tissue which fills the interspaces between the costae of many madreporarian corals, usually consisting of small transverse or oblique septa. Origin: Nl, fr. Gr. Outside + a case, box. Source: Websters Dictionary (01 Mar 1998) |
| exotheci-um | <botany> The outer coat of the anther. Origin: NL. See Exotheca. Source: Websters Dictionary (01 Mar 1998) |
| exotherm | A graph showing how much heat is produced by a chemical reaction at different points in time by plotting temperature versus time. (09 Oct 1997) |