Word: backsight
Part of speech: Noun
Syllables: back
sight
Definition: A measurement or reading taken back towards a point of known elevation, used to calculate the height of the surveying instrument (theodolite, transit, total station).
Morphemes:
Affix: back
Language: en
PoS: Noun
Meaning: The roof of a horizontal underground passage.
Affix: see
Language: en
PoS: Verb
Meaning: To reference or to study for further details.
Affix: -th
Language: en
PoS: Suffix
Meaning: Used to form a term denoting the ordinal numeral corresponding to the value, being a natural number, of a mathematical expression.