a tetravalent nonmetallic element; next to oxygen it is the most abundant element in the earth's crust; occurs in clay and feldspar and granite and quartz and sand; used as a semiconductor in transistors

a complete metric system of units of measurement for scientists; fundamental quantities are length ( meter) and mass ( kilogram) and time ( second) and electric current ( ampere) and temperature ( kelvin) and amount of matter ( mole) and luminous intensity ( candela)

the syllable naming the seventh ( subtonic) note of any musical scale in solmization

A syllable applied, in solmization, to the note B; more recently, to the seventh tone of any major diatonic scale. It was added to Guido's scale by Le Maire about the end of the 17th century.

In music, the seventh note of the major diatonic scale.

The seventh note of the scale.

The seventh note in the musical scale.

In music, a syllable applied to the seventh of the major diatonic scale in singing it.

" Si, signor," the man answered, " I the captain." – The Boy With the U. S. Life-Savers by Francis Rolt-Wheeler

" Si, Signorina," Nanni replied, without an instant's hesitation. – A Venetian June by Anna Fuller

The Shan- si man shrugged his shoulders. – Mortmain by Arthur Cheny Train

Al was so anxious to git through he hit Si Dudley in the mouth- injured him some, I guess. – The Complete PG Edition of The Works of Winston Churchill by Winston Churchill

The other, the Shan- si man, was tall and square- shouldered, and he carried his chin high and his arms folded in front of him. – Mortmain by Arthur Cheny Train

Oh yes, I've long resigned any pretensions, as I wrote you more than a year ago; you may go in and win- si le coeur t'en dit! – The Martian by George Du Maurier

The Bontoc man makes his ba- si in December. – The Bontoc Igorot by Albert Ernest Jenks

4. ur- sag- gal umun si d. – Sumerian Liturgies and Psalms by Stephen Langdon

" That woman did not understand her business," continued Si- Men, " or else she would have been back long ago!" – The Chinese Fairy Book by Various

He never thought very much of Si vis pacem, para bellum; it was not one of his best; but it seemed to please some of his political friends, one of whom asked if he might use it in his next speech in the Senate. – If I May by A. A. Milne

Por si acaso: In case that. – Pitman's Commercial Spanish Grammar (2nd ed.) by C. A. Toledano

Then Si- Men held his hand, and sent the girl back to her home, and the evil custom was at an end forever. – The Chinese Fairy Book by Various

Si, but it is a new camp. – The Ridin' Kid from Powder River by Henry Herbert Knibbs

" I don't see but what you'll have to get you one, Si," she said. – Entire PG Edition of The Works of William Dean Howells by William Dean Howells

" Si, si," they answered, for they had by now learned si, si. – The Enchanted April by Elizabeth von Arnim

" Si," answered Lopez, calmly. – The Bad Man by Charles Hanson Towne

Goulding, a flush struggling in his pale, told Mr Bloom, face of the night, Si in Ned Lambert's, Dedalus house, sang 'Twas rank and fame. – Ulysses by James Joyce

" Si hain't in politics, you understand," said Mr. Bixby. – The Complete PG Edition of The Works of Winston Churchill by Winston Churchill

" Oh, did you see Young Si? – Lucy Maud Montgomery Short Stories, 1896 to 1901 by Lucy Maud Montgomery