<span class="searchmatch">tracheidograms</span> plural of <span class="searchmatch">tracheidogram</span>...
From tracheid + -o- + -gram. <span class="searchmatch">tracheidogram</span> (plural <span class="searchmatch">tracheidograms</span>) (dendrochronology) A plot of the radial diameters of tracheids across an annual growth...