| ASSIENTOS | • assientos n. Plural of assiento. • ASSIENTO n. (Spanish) a treaty, esp. that between Spain and Britain, 1713 for the supply of African slaves for Spanish American dominions. |
| BIOGASSES | • biogasses n. Plural of biogas. • BIOGAS n. gas obtained by bioconversion. |
| BIOMASSES | • biomasses n. Plural of biomass. • BIOMASS n. the total mass of living material in an ecosystem. |
| CASSIOPES | • CASSIOPE n. an evergreen shrub. |
| ECOSSAISE | • écossaise n. A contra dance in a Scottish style, popular in France and Great Britain around the late eighteenth century. • ECOSSAISE n. (French) a dancing tune in the Scotch style. |
| GAPOSISES | • GAPOSIS n. a gap between buttoned buttons or closed snaps on a garment. |
| LOIASISES | • LOIASIS n. a tropical African disease. |
| OSSUARIES | • ossuaries n. Plural of ossuary. • OSSUARY n. a depository for the bones of the dead, also OSSARIUM. |
| PSORIASES | • psoriases n. Plural of psoriasis. • PSORIASIS n. the state of being affected with psora, a cutaneous disease. |
| SASSOLITE | • sassolite n. (Mineralogy) A volcanic mineral form of boric acid originally found in Sasso, near Volterra in Italy. • SASSOLITE n. a native boric acid, also SASSOLIN. |
| SESAMOIDS | • sesamoids n. Plural of sesamoid. • SESAMOID n. a small rounded bone formed in the substance of a tendon, e.g. in the flexor tendon of the big toe. |
| SESSIONAL | • sessional adj. Pertaining to a period, often an academic term or a sitting of a legislative body. • sessional n. An instructor hired by a college or universities on a temporary basis. • SESSIONAL adj. of or pertaining to a session or sessions. |
| SHAMOISES | • SHAMOIS v. to clean with this. |
| SOAPINESS | • soapiness n. The state or quality of being soapy. • SOAPINESS n. the state of being soapy. |
| SOLARISES | • solarises v. Third-person singular simple present indicative form of solarise. • SOLARISE v. to expose to sunlight, also SOLARIZE. |
| STEATOSIS | • steatosis n. (Medicine) The abnormal retention of lipids by a cell or organ. • STEATOSIS n. adiposity. |
| STOKESIAS | • stokesias n. Plural of stokesia. • STOKESIA n. a perennial herb of the southern US. |