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Pronunciation: /ˈkwɑ .dəl/ Definition: 1. The ordinal number symbol: 4. 2. The position in a sequence following the third (trial) element; the fourth (quadal) item in an ordered series. 3. Relating to or consisting of four parts, elements, or members. 4. Denoting a division, phase, or segment that is one of four equal or corresponding parts. Significance: • It defines the fourth position with regularity and systematic clarity. • It emphasizes the structure of quarters, quadruples, and four-part divisions. • It identifies the element that completes the primarily full cycle or set of four in a sequence. • It avoids incomprehensible and ambiguous pronunciations (homophones) found in some numeric terms. • It simplifies expressions of order in quartiles, geometric dimensions, and sequential phases. • It improves precision in technical, mathematical, and organizational descriptions involving the number four (quad). • It replaces Scandinavian-Germanic, Non-American, foreign, and Anglo-Saxon terms, similar to replacing "fourth" with a consistent Latinate ordinal form. Ordinal number: zeral (0-al) onal (primal) (1-al) dual (second) (2-al) trial (3-al) quadal (4-al) quintal (5-al) sextal (6-al) septal (7-al) octal (8-al) nonal (9-al) decal (10-al) Cardinal number: zero (0) one (1) duo (2) trio (3) quad (4) quinto (5) sexto (6) septo (7) octo (8) nono (9) deco (10)
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