'Button tree' definitions:

Definition of 'button tree'

noun

Evergreen tree or shrub with fruit resembling buttons and yielding heavy hard compact wood [syn: button tree, button mangrove, Conocarpus erectus]

From: GCIDE

Button \But"ton\, n. [OE. boton, botoun, F. bouton button, bud, prop. something pushing out, fr. bouter to push. See Butt an end.]
1. A knob; a small ball; a small, roundish mass. [1913 Webster]
2. A catch, of various forms and materials, used to fasten together the different parts of dress, by being attached to one part, and passing through a slit, called a buttonhole, in the other; -- used also for ornament. [1913 Webster]
3. A bud; a germ of a plant. --Shak. [1913 Webster]
4. A piece of wood or metal, usually flat and elongated, turning on a nail or screw, to fasten something, as a door. [1913 Webster]
5. A globule of metal remaining on an assay cupel or in a crucible, after fusion. [1913 Webster]
Button hook, a hook for catching a button and drawing it through a buttonhole, as in buttoning boots and gloves.
Button shell (Zool.), a small, univalve marine shell of the genus Rotella.
Button snakeroot. (Bot.) (a) The American composite genus Liatris, having rounded buttonlike heads of flowers. (b) An American umbelliferous plant with rigid, narrow leaves, and flowers in dense heads.
Button tree (Bot.), a genus of trees (Conocarpus), furnishing durable timber, mostly natives of the West Indies.
To hold by the button, to detain in conversation to weariness; to bore; to buttonhole. [1913 Webster]