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1. A line or place at which two things are joined.
2. Anatomy
a. A tract of nerve fibers passing from one side to the other of the spinal cord or brain.
b. The point or surface where two parts, such as the eyelids, lips, or cardiac valves, join or form a connection.
3. Botany The surface or place along which two structures, such as carpels, are joined.

[Middle English, from Latin commissūra, from commissus, past participle of committere, to join; see commit.]

com′mis·su′ral adj.
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References in periodicals archive ?
Plano-convex scallops produce significant lift when the commissural plane is in line with current flow (Gruffydd 1976, Millward & White 1992).
In a systematic manner, we assessed the mitral annulus, leaflet thickness and mobility, commissural and chordal fusion, the presence and location of calcific nodules, areas of prolapse and billowing, the direction of the regurgitant jet, thickness and length of chordae tendineae and MR grade.
Echocardiographic Assessment of Commissural Calcium: A Simple Predictor of Outcome After Percutaneous Mitral Balloon Valvotomy.
Color Body pale dull yellowish (possibly greenish in life; Muir 1931) with reddish mid-dorsal red to brown stripe following median carinae of coryphe and pronotum, weaker on midline mesonotum and commissural margin of forewings.
8 It can be assessed by the parallelism of the commissural and pupillary lines.
Differential roles for glutamate receptor subtypes within commissural NTS in cardiac-sympathetic reflex.
The left coronary ostia, which is normally at the commissural level, was not seen.
Inter commissural width was assessed using a scale and the distance between corners of the mouth on both the sides was measured.
The rheumatic process leads to inflammation, resulting in commissural fusion, thickening and fibrosis of both the leaflets and subvalvular apparatus.
1994) Netrins are diffusible chemotropic factors for commissural axons in the embryonic spinal cord.
Hontanilla and Marre compared the results of using the hypoglossal nerve (n = 25) and the masseteric nerve (n = 21), using commissural displacement and contraction velocity as outcomes measures.
sup][22] suggested that trans-median sprouting of the commissural interneurons present in the spinal cord and brainstem could be the reason, whereas Milligan et al .