trimount

Etymology

tri- + mount

noun

1. (heraldry) A stylized depiction of three hills or mountains.
   The allegorical figures standing on trimounts appear like guardians, flanking an archway formed by two fruit trees which frame the composite coat of arms. 1987, Veronika Birke, Walter L. Strauss, The Illustrated Bartsch, page 131
   On the shield of king Saint Stephen, the silver patriarchal cross on a trimount symbolizes royal power, the jupon worn over his armour is decorated by the family coat-of-arms of the Árpád dynasty. 1993, Ars Decorativa - Issues 13-15, page 21
   The Spengler Arms According to Siebmacher 's Wappenbuch and Riestap's Armoral General, the ancient (Nuremberg Spengler arms), were: Gules, a beaker argent on a trimount or: in other words, "a red shield emblazoned with a silver beaker resting on three golden hills. 2004, Donald Campbell Spangler, Spangler
2. A bracket or other supporting device that holds three attachments.
   And snap-in trimounts holding back covers of radios, etc. Handy knob puller too. 1949, Radio & Television News - Volume 42, page 11
   Trimounts can be used in a wide variety of ways. Choose the type of mount that is easiest for the type of roof on which you are working. 1978, Leon Cantor, How to select and install antennas, page 47
   The third mode of operation used the magnetic and suction trimounts included in the case. 2010, J. L. Bourne, Beyond Exile: Day by Day Armageddon, page 228

adj

1. Mounted in three places.
   Venous pressures were measured directly in 2 (2) subjects at l0g. using a vein in the forearm and recording pressures by means of a trimount inductance gauge. 1949, Federation of American Societies for Experimental Biology, American Physiological Society, Federation Proceedings - Volume 8, Issue 1, page 104
   Six-axle A1A (center axle unpowered) Alcos used single-drop-equalizer trucks with a short wheelbase (10'5") and even axle spacing; units with all axles powered used a trimount double-equalized truck with uneven spacing and a 12'6" wheelbase. 2009, Jeff Wilson, The Model Railroader's Guide to Diesel Locomotives, page 55