collimation
(noun) the accurate adjustment of the line of sight of a telescope
Source: WordNet® 3.1
collimation (countable and uncountable, plural collimations)
the act of collimating or something collimated
aligning lenses along line of sight to minimize aberrations
Source: Wiktionary
Col`li*ma"tion, n. Etym: [Cf. F. collimation, fr. a false reading (collimare) for L. collineare to direct in a straight line; col- + linea line. Cf. Collineation.]
Definition: The act of collimating; the adjustment of the line of the sights, as the axial line of the telescope of an instrument, into its proper position relative to the other parts of the instrument. Error of collimation, the deviation of the line collimation of an astronomical instrument from the position it ought to have with respect to the axis of motion of the instrument.
– Line of collimation, the axial line of the telescope of an astronomical or geodetic instrument, or the line which passes through the optical center of the object glass and the intersection of the cross wires at its focus.
Source: Webster’s Unabridged Dictionary 1913 Edition
28 February 2025
(adjective) pertaining to giving directives or rules; “prescriptive grammar is concerned with norms of or rules for correct usage”
Contrary to popular belief, coffee beans are not technically beans. They are referred to as such because of their resemblance to legumes. A coffee bean is a seed of the Coffea plant and the source for coffee. It is the pit inside the red or purple fruit, often referred to as a cherry. Just like ordinary cherries, the coffee fruit is also a so-called stone fruit.
