| sesquiplicate | <mathematics> Subduplicate of the triplicate; a term applied to ratios; thus, a and a' are in the sesquiplicate ratio of b and b', when a is to a' as the square root of the cube of b is to the square root of the cube of b', or a:a'::(b^3:(b'^3. "The periodic times of the planets are in the sesquiplicate ratio of their mean distances." (Sir I. Newton) Origin: Sesqui- + plicate. Source: Websters Dictionary (01 Mar 1998) |
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| sesquisalt | <chemistry> A salt derived from a sesquioxide base, or made up on the proportions of a sesqui compound. Origin: Sesqui- + salt. Source: Websters Dictionary (01 Mar 1998) |
| sesquisulphide | <chemistry> A sulphide, analogous to a sesquioxide, containing three atoms of sulphur to two of the other ingredient; formerly called also sesquisulphuret; as, orpiment, As2S3 is arsenic sesquisulphide. Origin: Sesqui- + sulphide. Source: Websters Dictionary (01 Mar 1998) |
| sesquiterpenes | Compounds formed from three isoprene units; may be acyclic, mono-, di-, or tricyclic; synthesised from farnesylpyrophosphate (e.g., trichothecin, nicin). (05 Mar 2000) |
| sesquitertianal | <mathematics> Having the ratio of one and one third to one (as 4: 3). Origin: Sesqui- + L. Tertianus belonging to the third. Cf. Tertian. Source: Websters Dictionary (01 Mar 1998) |
| sessile | Attached by a base rather than a stalk, a sessile lesion adheres closely to the surface (mucosa). (27 Sep 1997) |
| sessile hydatid | A vesicular nonpedunculated structure attached to the cephalic pole of the testis; a vestige of the cephalic end of the paramesonephric (mullerian) duct. Synonym: appendix testis, appendix of the testis, nonpedunculated hydatid, ovarium masculinum, sessile hydatid. (05 Mar 2000) |
| sessile polyp | Any form of polyp that has a relatively broad base. (05 Mar 2000) |
| sessile-eyed | <zoology> Having eyes which are not elevated on a stalk; opposed to stalk-eyed. Sessile-eyed Crustacea, the Arthrostraca. Source: Websters Dictionary (01 Mar 1998) |
| sesterce | A Roman coin or denomination of money, in value the fourth part of a denarius, and originally containing two asses and a half, afterward four asses, equal to about two pence sterling, or four cents. The sestertium was equivalent to one thousand sesterces, equal to |
| sesterterpenes | Compounds formed from five isoprene units; often have a tricyclic structure; formed from geranylfarnesylpyrophosphate (e.g., cochliobolin B). Origin: L. Sestertius, two and one-half,fr. Semis, half, + tertius, third, + terpene (05 Mar 2000) |