different between casement vs pullback

English

casement (plural casements)

A window sash that is hinged on the side.
- For at the window of my house I looked through my casement, and beheld among the simple ones, I discerned among the youths, a young man void of understanding.
A window having such sashes; a casement window.^Wp
- 1722, Daniel Defoe, A Journal of the Plague Year
  Passing through Tokenhouse Yard, in Lothbury, of a sudden a casement violently opened just over my head, and a woman gave three frightful screeches, and then cried, ‘Oh! death, death, death!’ in a most inimitable tone, and which struck me with horror and a chillness in my very blood.
- 1873, James Thomson (B.V.), The City of Dreadful Night
  The street-lamps always burn; but scarce a casement / In house or palace front from roof to basement / Doth glow or gleam athwart the mirk air cast.
- The house was a big elaborate limestone affair, evidently new. Winter sunshine sparkled on lace-hung casement, on glass marquise, and the burnished bronze foliations of grille and door.
(military) Occasionally seen as a usage error due to the similarity of the words: A casemate.

pull +? back

pullback (plural pullbacks)

The act or result of pulling back; a withdrawal.
(film) The act of drawing a camera back to broaden the visible scene.
That which holds back, or causes to recede; a drawback; a hindrance.
(architecture) The iron hook fixed to a casement to pull it shut, or to hold it partly open at a fixed point.
(finance) A reduction in the price of a financial instrument after reaching a peak
(sports) An attacking pass from the wing into a position further from the attacking goal line.
(historical) A device for making a woman's gown hang close and straight in front.
(differential geometry) The map between cotangent bundles of manifolds corresponding to a smooth map between smooth manifolds, which at each point is the dual map to the corresponding pushforward.
(category theory) The limit of a cospan: a Cartesian square or “pullback square”.
Synonyms: fiber product, fibre product, Cartesian square, pullback square
Hyponyms: equalizer, equaliser
(category theory) Within a Cartesian square (which has a pair of divergent morphisms and a pair of convergent morphisms) the divergent morphism which is directly opposite to a given one of the convergent morphisms, said to be “along” the convergent morphism which is between that pair of opposite morphisms. (The pullback is said to be “of” the given morphism.)

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