Boyd’s Bible Dictionary:
(knobs). Globular ornaments on the capitals of pillars (2 Chron. 4:12-13). Called “bowls” (1 Kings 7:41).
“Bowl” From Concise Bible Dictionary:
Besides the use to which bowls are commonly put, the word is applied to ornaments in the shape of a bowl placed on columns or on the golden candlestick (Ex. 25:31-34; Ex. 37:17-20; 1 Kings 7:41-42).
The Golden Candlestick
“Spring” From Concise Bible Dictionary:
See FOUNTAIN.
Strong’s Dictionary of Hebrew Words:
Meaning:
feminine from 1556; a fountain, bowl or globe (all as round)
KJV Usage:
bowl, pommel, spring