
1) Accidental 2) Extrinsic
Found on
https://www.crosswordclues.com/clue/adventitious

arising in abnormal positions, e.g. roots arising from the shoot system, buds arising elsewhere than in the axils of leaves
Found on
http://florabase.dpaw.wa.gov.au/help/glossary

accidental; casual
Found on
http://phrontistery.info/a.html

• (a.) Added extrinsically; not essentially inherent; accidental or causal; additional; supervenient; foreign. • (a.) Accidentally or sparingly spontaneous in a country or district; not fully naturalized; adventive; -- applied to foreign plants. • (a.) Acquired, as diseases; accidental. • (a.) Out of the proper or usual place; a...
Found on
http://thinkexist.com/dictionary/meaning/adventitious/

Arising in an unusual position; often said of adventitious roots or buds.
Found on
http://www.anbg.gov.au/cpbr/cd-keys/orchidkey/html/glossary.html

occurring in unusual or unexpected locations such as roots on aerial stems or buds on leaves. Also meaning
Found on
http://www.calflora.net/botanicalnames/botanicalterms.html

Referring to a structure arising fron an unusual place, such as stems from roots or roots from stems.
Found on
http://www.daviddarling.info/encyclopedia/A/adventitious.html

Having growth from places where normally growth does not occur (i.e. if a stem is buried and a plant will grow.)
Found on
http://www.encyclo.co.uk/local/20077

Originating from other than the usual location.
Found on
http://www.encyclo.co.uk/local/20637

<botany> Describes roots or shoots or other parts that grow in an uncharacteristic place on a plant (such as roots growing from leaves). ... (06 May 1997) ...
Found on
http://www.encyclo.co.uk/local/20973

(ad″ven-tish´әs) not normal to a part.
Found on
http://www.encyclo.co.uk/local/21001

occurring in unusual or unexpected locations such as roots on aerial stems or buds on leaves
Found on
http://www.encyclo.co.uk/local/21767

Roots and buds that appear on a stem in abnormal places
Found on
http://www.encyclo.co.uk/local/22113

Roots or buds arising from an unusual position on a stem eg. roots on stems, or buds produced elsewhere than in the axils of leaves or the extremities of stems.
Found on
http://www.encyclo.co.uk/visitor-contributions.php

Ad`ven·ti'tious adjective [ Latin adventitius .] 1. Added extrinsically; not essentially inherent; accidental or causal; additional; supervenient; foreign. « To things of great dimensions, if we annex an adventitious idea of terror, they become without comparison greater.
Found on
http://www.encyclo.co.uk/webster/A/34

Roots and buds that appear on a stem in abnormal places
Found on
http://www.first-nature.com/flowers/~glossary.php

Type: Term Pronunciation: ad-ven-tish′ŭs Definitions: 1. Arising from an external source or occurring in an unusual place or manner. 2. Occurring accidentally or spontaneously, as opposed to naturally or through heredity. Synonyms: adventitial
Found on
http://www.medilexicon.com/medicaldictionary.php?t=1433

Adventitious: Coming from an external source or occurring in an unusual place or manner. Not inherent, inherited or innate but rather occurring accidentally or spontaneously. When a doctor or nurse auscults (listens to) the chest or abdomen, adventitious sounds are those that are normally not heard coming from the chest or abdomen. The word 'advent...
Found on
http://www.medterms.com/script/main/art.asp?articlekey=13490

produced out of the usual or normal place, such as some roots or buds
Found on
https://www.encyclo.co.uk/local/22591

associated with something by chance rather than as an integral part; extrinsic. · appearing in an abnormal or unusual position or place, as a root.
Found on
https://www.infoplease.com/dictionary/adventitious
[Intelligent words] associated by chance and not an integral part
Found on
https://www.vocabulary.com/lists/52473
No exact match found.