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ureometer
ureometer n. 
/ˌjɔːrɪˈɒmᵻtə/,
Brit. /ˌjʊərɪˈɒmᵻtə/
, /ˌjʊərɪˈɒmᵻtə//ˌjɔːrɪˈɒmᵻtə/U.S. /ˌjʊriˈɑmədər/
= ureo-carbonate n./ˌjʊriˈɑmədər/ΚΠ
1876 J. G. Blackley in Jrnl. Chem. Soc. 30 467 A modification of Russell and West's ureometer.
a1884 E. H. Knight Pract. Dict. Mech. Suppl. 915/1 In Hüfner's new ureometer,..the exact methods for the determination of urea in organic liquids are..complex and tedious.
1901 Lancet 9 Mar. 697/1 I have examined the urine with Martindale's ureometer.
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