D
\dˈiː], \dˈiː], \d_ˈiː]\
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The fourth letter of the English alphabet, and a vocal consonant. The English letter is from Latin, which is from Greek, which took it from Phnician, the probable ultimate origin being Egyptian. It is related most nearly to t and th; as, Eng. deep, G.
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The nominal of the second tone in the model major scale (that in C), or of the fourth tone in the relative minor scale of C (that in A minor), or of the key tone in the relative minor of F.
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As a numeral stands for 500. in this use it is not the initial of any word, or even strictly a letter, but one half of the sign (or ) the original Tuscan numeral for 1000.
By Noah Webster.
By William Hand Browne, Samuel Stehman Haldeman
By James Champlin Fernald
Word of the day
Proto Oncogene Proteins c erbB 2
- cell surface protein-tyrosine kinase that is found to be overexpressed in significant number adenocarcinomas. It has extensive homology can heterodimerize EGF EPIDERMAL GROWTH FACTOR), 3 receptor (RECEPTOR, 3) and the 4 receptor. Activation of erbB-2 receptor occurs during heterodimer formation with a ligand-bound erbB family members. EC 2.7.11.-.