One that serves as a means of support or assistance.
A stay, or line, extending forward from the mainmast, supporting it and holding it in position
Such a stone, often inscribed, laid at a ceremony marking the origin of a building.
A facial cosmetic used to even out the complexion or provide a surface for other makeup; a foundation.
The highest, primary, or most valuable part, attribute, or state:
A rule or law concerning the functioning of natural phenomena or mechanical processes:
A plant part that usually grows underground, secures the plant in place, absorbs minerals and water, and stores food manufactured by leaves and other plant parts. Roots grow in a root system. Eudicots and magnoliids have a central, longer, and larger taproot with many narrower lateral roots branching off, while monocots have a mass of threadlike fibrous roots , which are roughly the same length and remain close to the surface of the soil. In vascular plants, roots usually consist of a central cylinder of vascular tissue, surrounded by the pericycle and endodermis, then a thick layer of cortex, and finally an outer epidermis or (in woody plants) periderm. Only finer roots (known as feeder roots) actively take up water and minerals, generally in the uppermost meter of soil. These roots absorb minerals primarily through small epidermal structures known as root hairs. In certain plants, adventitious roots grow out from the stem above ground as aerial roots or prop roots, bending down into the soil, to facilitate the exchange of gases or increase support. Certain plants (such as the carrot and beet) have fleshy storage roots with abundant parenchyma in their vascular tissues.
A shoe having a heel that extends across the shank to the half sole, forming a continuous undersurface.
(Music) A tonal system consisting of seven tones in fixed relationship to a tonic, having a characteristic key signature and being the structural foundation of the bulk of Western music; tonality.
A source of security or stability.
Strength of character; determination:
A locking pin inserted in the end of a shaft, as in an axle, to prevent a wheel from slipping off.
A pin inserted through holes at the end of an axle, so as to secure a wheel
Find another word for keystone. In this page you can discover 18 synonyms, antonyms, idiomatic expressions, and related words for keystone, like: buttress, prop, mainstay, cornerstone, brace, foundation, support, base, crown, headstone and principle.