pseudonodule

pseudonodule

[¦sü·dō′näj‚ül]
(geology)
A primary sedimentary structure consisting of a ball-like mass of sandstone enclosed in shale or mudstone; characterized by a rounded base with upturned or inrolled edges and resulting from the settling of sand into underlying clay or mud which has welled up between isolated sand masses. Also known as sand roll.
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References in periodicals archive ?
For the diagnosis of Hashimoto thyroiditis in the cases determined as having hypothyroidism, the following criteria were considered to be present: heterogeneous pattern in thyroid USG, pseudonodules and/or diffuse bands together with Anti-TPO and/or Anti-Tg positivity.
Host-plant responses to LCOs involve calcium as a second messenger via G protein and phospholipases C and D, and include root hair deformation, infection thread formation, cortical cell division, and the formation of pseudonodules in some species (for recent reviews see Broughton et al.