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amphiphloic

amphiphloic  

A vascular bundle morphology in which the phloem occurs as concentric cylinders outside and inside the xylem.
ectotrophic mycorrhiza

ectotrophic mycorrhiza  

A mycorrhiza in which the fungal component forms 2 sheath layers around the roots of a plant, the inner layer forming a sense mesh of hyphae, called the hartig net. The close association of the ...
endotrophic mycorrhiza

endotrophic mycorrhiza  

A type of mycorrhiza in which the fungal component penetrates the plant root, either pathogenically or beneficially. The fungal component does not change the root morphology. Compare ectotrophic ...
enkephalin

enkephalin  

Pentapeptides with opiate-like activity (compare with endorphins), first isolated in 1975 from pig brain. Met-enkephalin has the amino acid sequence Tyr-Gly-Gly-Phe-Met; Leu-enkephalin has the ...
geographical variety

geographical variety  

A subdivision of a species with distinct morphology and a distinctive geographical range, which is given a unique Latin name. A taxonomic variety is known by the first validly published name applied ...
grammar

grammar  

The whole system and structure of a language or of languages in general, usually taken as consisting of syntax and morphology (including inflections) and sometimes also phonology and semantics; ...
growth form

growth form  

1 The morphology of an animal, especially as it reflects its physiological adaptation to the environment.2 Shape of population growth, as expressed by a growth curve (e.g. J-shaped, S-shaped).
ichnology

ichnology  

A subdiscipline of palaeontology or, more specifically, of palaeoecology, which is concerned with the study of ichnofossils and their value in the analysis of sedimentary sequences and the morphology ...
isophylly

isophylly  

The state of having leaves all of the same morphology on 1 plant. Compare heterophylly.
lexeme

lexeme  

A word, in the sense of a dictionary entry. Distinct string of letters may be forms of the same lexeme (‘fills’, ‘filled’, ‘filling’); conversely, identical strings of letters (bank, the institution, ...
morphometrics

morphometrics  

A technique of taxonomic analysis using measurements of the form (morphology) of organisms and typically involving multivariate statistics.
morphospecies

morphospecies  

A group of biological organisms whose members differ from all other groups in some aspect of their form and structure (see morphology), but are so similar among themselves that they are lumped ...
paradigm

paradigm  

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Essentially, a large-scale and generalized model that provides a viewpoint from which the real world may be investigated. It differs from most other models, which are abstractions based on data ...
plastid

plastid  

An organelle within a plant cell, often occurring in large numbers. Apart from the nucleus, plastids are the largest solid inclusions in a plant cell. For convenience they are classified into those ...
protostele

protostele  

One of 2 basic morphologies of steles, the other being siphonostele. Protosteles are the more primitive, being characterized by a single strand of xylem in the centre of the stem or root, and lacking ...
René B. Thom

René B. Thom  

(1923–2002)French mathematician, awarded the Fields Medal in 1958 for work in topology, but best known for his development of the mathematics in catastrophe theory, where continuous or incremental ...
river form

river form  

The morphology of a river channel, which differs between alluvial channels and bedrock channels, which display different forms of river equilibrium.
rudist bivalves

rudist bivalves  

An extinct group of coral- and horn-shaped bivalves (Bivalvia, subclass Heterodonta). They have a variable morphology and many species are not easily seen to be bivalves. They are adapted to a ...
siphonostele

siphonostele  

One of 2 basic morphologies of stele, the other being protostele. Siphonosteles are the more highly developed form, being characterized by a cylinder of xylem and phloem surrounding a pith. ...
tetrapodomorph

tetrapodomorph  

A fossil animal that is morphologically intermediate between fishes and tetrapods (Tetrapoda).

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