hoizontal line
It means parallel to level ground, at right angles to the vertical
a horizontal row is called a period.a vertical row is called a group
No, it's called a data record
A row of connected mountains is called a mountain range.
A vertical row of bricks is called a channel.
Each row below the header row is called a "data row" or simply a "record." These rows contain specific information or entries that correspond to the categories defined in the header row.
The vertical "rows" are called Columns, and the horizontal "rows" are called Periods
header row
Each row on the periodic table is called a period, while each column is called a group.
The intersection of row and column is called a cell.
A group of hourses are called gaggle or flock