lamella
/ləˈmɛlə
/noun (plural lamellae /liːˈmɛlə/)
1A thin layer, membrane, or plate of tissue, especially in bone.Tunas have numerous lamellae (gill membranes) and very thin lamellar walls, and are able to extract more oxygen from the water than any other fish....
- Studies of intact animals, isolated gills, gill lamellae, and membrane vesicles have produced a variety of models of osmoregulatory ion transport in euryhaline crustaceans.
- In the cell corner middle lamella, gold particles are mainly associated with the dense regions.
1.1 Botany A membranous fold in a chloroplast.Sections were made at distances of 200 mm, 100 mm and 40 mm from tips of an adventitious root and stained with Sudan Red 7B. Lipophilic substances such as suberin lamellae, were stained bright red....
- Exodermal suberin lamellae started to develop 30 mm behind the root tip in rice and were fully developed at about 60 mm behind the tip.
- The enzyme randomly cleaves ß - 1,4 linked galacturonosyl residues of pectins from the middle lamella and primary cell-walls of higher plants, resulting in the maceration of plant tissues.
Derivatives
lamellar
/ adjective ...- Michael's presentation was on ‘the use of lamellar liquid crystals as novel reaction media.’
- The layer of polar lipid headgroups separates the apolar hydrocarbon core of the membrane from the surrounding aqueous phase and stabilizes its lamellar structure.
- In the whole range of cholesterol concentration explored, the diffraction studies show a single lamellar phase with no evidence of a separation of extended domains.
lamellate
/ adjective ...- A continuous, thinly lamellate, outer region that varies in thickness overlies large expanded peg-like areas of ECM that extend from the primary wall and localize with anti-JIM7.
- They differ from Eurytholia sclerites in having marginal and ventral accretion of the lamellate shell, in their bilateral symmetry, dorsal ornament of ribs and ridges, and shell folded under a posterior apex.
- Also, material from the earliest Carboniferous (early Tournasian) of France reveals a possible endosternite, gut trace and lamellate gills.
lamelliform
- Adrenocortical hyperplasia and adrenocortical neoplasms have pleomorphic mitochondria with tubulovesicular and lamelliform cristae and occasional inclusions.
- The annulus fibrosus is made of lamelliform connective tissue bands.
lamellose
- The shell surface is apparently devoid of ornament (possibly through preservation), except for the anterior margin of the trail which bears faint, irregular, undulating, and lamellose growth lines.
- The main part of the shell is coarsely commarginally lamellose and lacks radial costae.
- The three known species of Loxochlamys share similar shape and micro-ornament, including a tendency to become commarginally lamellose late in ontogeny.
Origin
Late 17th century: from Latin, diminutive of lamina 'thin plate'.
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