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(1) Old  [ Botany - Biology ]

Dictionary of botanic terminology - index of names

Synonyms: Aged, Older, Advanced in years, Mature, Adult, Ancient, Senescent, Senile, Superannuated
  Having lived for a relatively long time or attained a specific age ― usually used in combination <a 3-year-old plant>  
Advanced in years or age, may apply to either actual or merely relative length of existence.
Old age consists of ages nearing the average lifespan of a  living beings, and thus the end of the organisms life cycle. Euphemisms for older organisms include advanced, adult, elderly, and senescent. Older animal and vegetal have usually lost most original attributes through age and have limited regenerative abilities, they are also more prone to disease,  than other adults. For the biology of aging see Senescence.
(2) Old  [ Botany - Biology ]

Dictionary of botanic terminology - index of names

Synonyms: Previouse, Past, Ex-, Former, Olden, Of old, Early, Ancient, Earlier, Earliest, Ancient, Primeval, Primordial, Prehistoric, Archaic,


Persisting from an earlier time,  just preceding something else in time or order; <an old scar in the stem>  


Of, relating to, or originating in a past era, archaic;  <an old species>

Implies having the character or characteristics of a much earlier time: <leaf in Opuntia are an old (archaic) character >
See: Phylogenesis

(3) Old  [ Botany - Biology ]  

Of a very early stage in development; < Old basal leaves >

See: Ontogenesis

(4) Old  [ Botany - Biology ]  
Synonyms: Outdated, overused
  Of long duration; not new, showing the effects of time or use;  < an old trunk >  
(5) Old   
  No longer in use; < An old grafting methodology >  





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