crown of root
31oak-root rot — /ohk rooht , root /, Plant Pathol. a disease of oaks and other trees and woody plants, caused by the fungus Amillariella mellea (oak root fungus), the fruiting body of which is the honey mushroom, and characterized by rotting roots, girdling of… …
32Aerial root — Pneumatophore redirects here. It is also a name for the air bladder of the Portuguese Man o War. Aerial roots are roots that are aboveground. They are almost always adventitious. They are found in diverse plant species, including epiphytes also… …
33hairy root disease — A disease of broad leaved plants, where a proliferation of root like tissue is formed from the stem. Hairy root disease is a tumorous state similar to crown gall, and is induced by the bacterium Agrobacterium rhizogenes, when containing an Ri… …
34black root rot — noun : any of several diseases of plants marked by dark often confluent lesions of the root and sometimes the crown often involving the whole cortex: as a. : a disease of apples caused by a fungus (Xylaria mali) b. : a disease of tobacco and… …
35hairy root — noun a phase of crown gall (especially in apples) during which there is abnormal development of fine fibrous roots • Hypernyms: ↑crown gall * * * noun : a phase of the crown gall disease especially in apples characterized by abnormal development… …
36Bonwill crown — an artificial porcelain crown held to the tooth root by means of a threaded metal dowel extending through a hole in the porcelain, and upon which a nut is screwed …
37collar crown — an artificial crown attached by a metal ferrule to a natural tooth root …
38dowel crown — an artificial crown that replaces the entire coronal portion of a tooth and is retained by a dowel extending into a filled root canal …
39physiological crown — the portion of a tooth that is exposed beyond the gingival crevice or the margin of the gum. It may involve all of the part of a tooth covered by enamel (dental c.; see corona dentis [TA]) or a portion of it (clinical crown; see corona clinica… …
40strawberry crown borer — noun or strawberry borer or strawberry root borer : a weevil (Tyloderma fragariae) whose larva bores in the crown of the strawberry …
