| sag | 1. To sink, in the middle, by its weight or under applied pressure, below a horizontal line or plane; as, a line or cable supported by its ends sags, though tightly drawn; the floor of a room sags; hence, to lean, give way, or settle from a vertical position; as, a building may sag one way or another; a door sags on its hinges. 2. To lose firmness or elasticity; to sink; to droop; to flag; to bend; to yield, as the mind or spirits, under the pressure of care, trouble, doubt, or the like; to be unsettled or unbalanced. "the mind I sway by, and the heart I bear, Shall never sag with doubt nor shake with fear." (Shak) 3. To loiter in walking; to idle along; to drag or droop heavily. To sag to leeward, to make much leeway by reason of the wind, sea, or current; to drift to leeward; said of a vessel. Origin: Akin to Sw. Sacka to settle, sink down, LG.sacken, D. Zakken. Cf. Sink. Source: Websters Dictionary (01 Mar 1998) |
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| sagacity | The quality of being sagacious; quickness or acuteness of sense perceptions; keenness of discernment or penetration with soundness of judgment; shrewdness. "Some [brutes] show that nice sagacity of smell." (Cowper) "Natural sagacity improved by generous education." (V. Knox) Synonym: Penetration, shrewdness, judiciousness. Sagacity, Penetration. Penetration enables us to enter into the depths of an abstruse subject, to detect motives, plans, etc. Sagacity adds to penetration a keen, practical judgment, which enables one to guard against the designs of others, and to turn everything to the best possible advantage. Origin: L. Sagacitas. See Sagacious. Source: Websters Dictionary (01 Mar 1998) |
| sagamore | 1. [Cf. Sachem] The head of a tribe among the American Indians; a chief; generally used as synonymous with sachem, but some writters distinguished between them, making the sachem a chief of the first rank, and a sagamore one of the second rank. "Be it sagamore, sachem, or powwow." 2. A juice used in medicine. Source: Websters Dictionary (01 Mar 1998) |
| sagapenum | <medicine> A fetid gum resin obtained from a species of Ferula. It has been used in hysteria, etc, but is now seldom met with. Origin: L. Sagapenon, sacopenium, Gr., cf. F. Sagapin, gomme sagapin, sagapenum, Ar. Sikbinaj, Per. Sakbinah, sikbinah. Source: Websters Dictionary (01 Mar 1998) |
| sage | <botany> A suffriticose labiate plant (Salvia officinalis) with grayish green foliage, much used in flavoring meats, etc. The name is often extended to the whole genus, of which many species are cultivated for ornament, as the scarlet sage, and Mexican red and blue sage. The sagebrush. <botany> Meadow sage, a species of willow (Salix tristis) forming a low bush with nearly sessile grayish green leaves. Origin: OE. Sauge, F. Sauge, L. Salvia, from salvus saved, in allusion to its reputed healing virtues. See Safe. Source: Websters Dictionary (01 Mar 1998) |
| sagenite | <chemical> Acicular rutile occurring in reticulated forms imbedded in quartz. Origin: F. Sagenite, fr. L. Sagena a large net. See Saine. Source: Websters Dictionary (01 Mar 1998) |
| sagenitic | <chemical> Resembling sagenite; applied to quartz when containing acicular crystals of other minerals, most commonly rutile, also tourmaline, actinolite, and the like. Source: Websters Dictionary (01 Mar 1998) |
| sagitta | 1. <astronomy> A small constellation north of Aquila; the Arrow. 2. The keystone of an arch. 3. <geometry> The distance from a point in a curve to the chord; also, the versed sine of an arc; so called from its resemblance to an arrow resting on the bow and string. 4. <anatomy> The larger of the two otoliths, or ear bones, found in most fishes. 5. <zoology> A genus of transparent, free-swimming marine worms having lateral and caudal fins, and capable of swimming rapidly. It is the type of the class Chaetognatha. Origin: L, an arrow. Source: Websters Dictionary (01 Mar 1998) |
| sagittal | 1. Of or pertaining to an arrow; resembling an arrow; furnished with an arowlike appendage. 2. <anatomy> Of or pertaining to the sagittal suture; in the region of the sagittal suture; rabdoidal; as, the sagittal furrow, or groove, on the inner surface of the roof of the skull. In the mesial plane; as, a sagittal section of an animal. <anatomy> Sagittal suture, the suture between the two parietal bones in the top of the skull. Synonym: rabdoidal suture, and interparietal suture. Origin: L. Sagitta an arrow: cf. F. Saguttal. Source: Websters Dictionary (01 Mar 1998) |
| sagittal axis | In dentistry, the line in the frontal plane around which the working side condyle rotates during mandibular movement. (05 Mar 2000) |
| sagittal border of parietal bone | The medial border of the parietal bone entering into the sagittal suture. Synonym: margo sagittalis ossis parietalis. (05 Mar 2000) |
| sagittal crest | A prominent ridge along the sagittal suture of the skull, present in some animals as a result of temporal muscle development. (05 Mar 2000) |
| sagittal fontanel | An occasional fontanel-like defect in the sagittal suture in the newborn. Synonym: Gerdy's fontanel. (05 Mar 2000) |
| sagittal groove | The groove in the midline of the inner table of the calvaria lodging the superior sagittal sinus. Synonym: sulcus sinus sagittalis superioris, sagittal groove, sagittal sulcus, superior longitudinal sulcus. (05 Mar 2000) |
| sagittal line | Any line parallel to the midline, indicating a sagittal plane. (05 Mar 2000) |