couple-close

from The Century Dictionary.

• noun In architecture, a pair of spars for a roof; couples.
• noun In heraldry, the fourth of a chevron, never borne but in pairs unless there is a chevron between them. Also written couple-closs.

from the GNU version of the Collaborative International Dictionary of English.

• noun (Her.) A diminutive of the chevron, containing one fourth of its surface. Couple-closes are generally borne one on each side of a chevron, and the blazoning may then be either a chevron between two couple-closes or chevron cottised.
• noun (Arch.), Engl. A pair of rafters framed together with a tie fixed at their feet, or with a collar beam.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun heraldry A diminutive of the chevron, always borne in closely placed pairs.