| FDI | F?d?ration Dentaire Internationale = International Dental Association |
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| ACR | Albumin-creatinine ration |
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| EVR | endocardial viability ration |
| L/S | lecithin/sphingomyelin ration |
| MTR | magnetisation transfer ration |
| PER | protein efficiency ration |
| shelter | 1. That which covers or defends from injury or annoyance; a protection; a screen. "The sick and weak the healing plant shall aid, From storms a shelter, and from heat a shade." (Pope) 2. One who protects; a guardian; a defender. "Thou [God] hast been a shelter for me." (Ps. Lxi. 3) 3. The state of being covered and protected; protection; security. "Who into shelter takes their tender bloom." (Young) Shelter tent,a small tent made of pieces of cotton duck arranged to button together. In field service the soldiers carry the pieces. Synonym: Asylum, refuge, retreat, covert, sanctuary, protection, defense, security. Origin: Cf. OE. Scheltrun, shiltroun, schelltrome, scheldtrome, a guard, squadron, AS. Scildtruma a troop of men with shields; scild shield + truma a band of men. See Shield. Source: Websters Dictionary (01 Mar 1998) |
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| basal ration | Minimal diet containing only essential components. (05 Mar 2000) |
| ration | 1. A fixed daily allowance of provisions assigned to a soldier in the army, or a sailor in the navy, for his subsistence. Officers have several rations, the number varying according to their rank or the number of their attendants. 2. Hence, a certain portion or fixed amount dealt out; an allowance; an allotment. Origin: F, fr. L. Ratio a reckoning, calculation, relation, reference, LL. Ratio ration. See Ratio. Source: Websters Dictionary (01 Mar 1998) |
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