A geometric puzzle involving calculating the width of an alley based on the height at which two ladders cross when propped diagonally across it.

Polemonium vanbruntiae, a species of flowering plant.

(idiomatic) To prevent others from attaining or benefiting from the same advantages, opportunities, or rights as oneself.

(idiomatic) Alternative form of pull the ladder up behind oneself.

Resembling a ladder (device used for climbing).

(organic chemistry) Any of a class of polycyclic hydrocarbons, consisting of repeating cyclobutane moieties, that resemble ladders

plural of ladderane

(physics) A device, in the form of a series of metal bars joined by non-conducting links, used in electrostatic accelerators / (physics) A form of klystron that uses ladders

Without a ladder.

A word ladder puzzle.