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Tissara
Tissara, also known as Devasara, was a Sri Lankan Buddhist nun who led eleven nuns to Nanjing in 433 CE, enabling China's first lawful dual bhikkhuni ordination.
Tissarakkhita
Tissarakkhita (तिस्सरक्खिता) is a queen of the Mauryan emperor Ashoka, known from Buddhist legend; stories say she destroyed the Bodhi tree and plotted against Kunala.
Tisserand parameter
The Tisserand parameter, or Tisserand invariant, is a dimensionless orbital quantity, introduced by Félix Tisserand in 1896, that stays nearly constant when a comet passes close to a planet.
Tissium
Tissium is a Paris-based medical technology company, founded in 2013, that develops bioresorbable, light-activated polymers for sutureless tissue reconstruction; its COAPTIUM CONNECT system received FDA authorization for peripheral nerve repair in 2025.
Tissot
Tissot SA is a Swiss watchmaker founded in Le Locle in 1853 by Charles-Félicien Tissot and his son Charles-Émile, and today a Swatch Group brand known for accessible Swiss watches.
Tissue (biology)
A tissue is a group of similar cells organized to perform a particular function, such as contraction or transport; animals have epithelial, connective, muscle, and nervous tissues.
Tissue Adhesives
Tissue adhesives (skin glues, cyanoacrylates such as Dermabond, fibrin sealants) are polymerizing medical materials that close wounds or seal tissue without sutures; evidence shows similar infection rates but higher dehiscence risk than sutures.
Tissue clearing
Tissue clearing is a set of chemical techniques that make fixed biological specimens transparent by homogenizing refractive index, enabling three-dimensional imaging of intact organs and whole animals.
Tissue culture
Tissue culture is the aseptic in vitro maintenance and growth of plant or animal cells, tissues, or organs on nutrient media, used in agriculture for micropropagation and disease-free planting material.
Tissue dissociation
Tissue dissociation is a laboratory method that breaks solid tissue into a suspension of single living cells, combining enzymatic digestion with mechanical shearing for analysis or culture.
Tissue Distribution
Tissue distribution (MeSH D014018): accumulation of a drug or chemical in body organs, expressed as tissue-to-plasma ratios; governed by perfusion, membrane permeability, protein binding, and barriers like the blood-brain barrier.
Tissue Doppler echocardiography
Tissue Doppler echocardiography (TDI, Doppler tissue imaging) measures myocardial velocities from high-amplitude, low-velocity ultrasound signals, introduced by Isaaz and McDicken/Sutherland around 1989-1990s; yields e′, a′, s′, strain rate; angle-dependent, superseded by speckle tracking for strain.
Tissue embedding
Tissue embedding is the histology step in which fixed tissue is infiltrated with a support medium such as paraffin wax, OCT, or resin so thin sections can be cut for microscopy.
Tissue engineering
Tissue engineering, also called engineered tissue, is an interdisciplinary field combining engineering and life sciences to create biological substitutes that restore tissue or organ function.
Tissue engineering and regenerative medicine
Tissue engineering and regenerative medicine (TERM): interdisciplinary field combining life science, materials science, engineering, and clinical medicine to repair or replace damaged tissues and organs; key elements are biomaterials, seed cells, and active factors, with vascularization the main translational barrier.
Tissue expansion
Tissue expansion is a surgical technique in which an implanted balloon is gradually inflated to stretch nearby skin, generating matched tissue for reconstruction, most often for burns and breast reconstruction.
Tissue Expansion Devices
Tissue expansion devices are medical devices that stretch tissue to stimulate new growth for surgical reconstruction, commonly inflatable silicone reservoirs implanted and gradually inflated with saline.
Tissue factor
Tissue factor (thromboplastin, factor III, CD142) is a transmembrane glycoprotein receptor for factor VIIa that initiates blood coagulation; regulated by TFPI, essential in mice, contested in blood.
Tissue fixation
Tissue fixation is the chemical preservation of excised tissue, usually in formaldehyde, that stabilizes proteins and nucleic acids and halts decay before staining or analysis.
Tissue homogenization
Tissue homogenization is the mechanical disruption of soft tissue in a buffer, releasing intracellular proteins, RNA, and DNA into a cell-free lysate for downstream extraction and analysis.
Tissue inhibitor of metalloproteinase
Tissue inhibitors of metalloproteinases (TIMPs, TIMP-1 to TIMP-4) are endogenous human proteins that inhibit matrix metalloproteinases, ADAMs, and ADAMTSs in tight 1:1 complexes, with TIMP-3 the broadest and ECM-bound, plus metalloproteinase-independent signaling roles.
Tissue microarray
A tissue microarray (TMA) is a paraffin block holding hundreds of small tissue cores from donor specimens, allowing parallel analysis of many molecular markers across hundreds of tumors.
Tissue oximetry
Tissue oximetry is a noninvasive optical technique that measures oxygen saturation within tissue. It utilizes near-infrared spectroscopy to reflect the balance of oxygen supply and demand at the bedside.
Tissue paper
Tissue paper is a class of lightweight, creped papers of 15–60 g/m² made for cleaning, hygiene, and cosmetic purposes, including toilet paper, facial tissue, paper towels, and napkins.
Tissue Preservation
Tissue preservation keeps cells and tissues viable or intact outside the body using hypothermic storage, slow freezing, vitrification, or fixation; clinical organ storage uses 0–4°C solutions, while long-term banking relies on cryopreservation at −80 to −196°C.
Tissue processing
Tissue processing, also called tissue preparation, is the laboratory sequence of dehydration, clearing, and paraffin infiltration that converts fixed tissue into a block for sectioning.
Tissue recombination
Tissue recombination is a developmental biology method in which epithelium and mesenchyme are separated, recombined, and grafted in vivo to test how mesenchyme instructs epithelial development, famously inducing prostatic growth.
Tissue Transplantation
Tissue transplantation, also called tissue grafting, transfers tissue within a person, between people, or across species. Covers autografts, allografts, xenografts, rejection immunology, history from 1879 Macewen to modern HCT, and WHO ethics.
Tissue typing
Tissue typing is the laboratory determination of a person's human leukocyte antigen (HLA) alleles to match donors with recipients for organ or hematopoietic stem cell transplantation.
Tissue-resident macrophage
A tissue-resident macrophage is a long-lived immune cell that stays in a specific organ, renews itself locally rather than arriving from blood, and performs functions tailored to that tissue.