valvate

American Heritage® Dictionary of the English Language, Fourth Edition

1. adj. Having valvelike parts.
2. adj. Botany Meeting at the edges without overlapping, as some petals do.
3. adj. Botany Opening by valves, as the capsule of a lily or iris.

Century Dictionary and Cyclopedia

1. In anatomy and zoology: Like a valve in form or function; resembling or serving for a valve; forming a valve; valvular; valviform: as, a valvate fold of membrane, Having a valve; provided with valves; valviferous; valvated: as, valvate vessels; a valvate orifice.
2. In botany, united by the margins only, and opening as if by doors or valves, as the capsules of regularly dehiscent fruits, the anthers of certain Ericaceæ, and the parts of a perianth which in the bud meet without overlapping: said also of an estivation thus characterized.

Wiktionary

1. adj. Having valves (that open and close)

GNU Webster's 1913

1. adj. Resembling, or serving as, a valve; consisting of, or opening by, a valve or valves; valvular.
2. adj. Meeting at the edges without overlapping; -- said of the sepals or the petals of flowers in æstivation, and of leaves in vernation.
3. adj. Opening as if by doors or valves, as most kinds of capsules and some anthers.