Aa

Named to always appear first in alphabetical listings; or alternatively after Pieter van der Aa.

Aa f

1. A taxonomic genus within the family Orchidaceae – a group of orchids of cool climates in Latin America.

• (genus): Eukaryota – superkingdom; Plantae – kingdom; Viridiplantae – subkingdom; Streptophyta – infrakingdom; Embryophyta – superphylum; Tracheophyta – phylum; Spermatophytina – subphylum; angiosperms, monocots – clades; Asparagales – order; Orchidaceae – family; Orchidoideae - subfamily; Cranichideae - tribe; Cranichidinae - subtribe

• (genus): Aa paleacea - type species; for other species see Aa at The Plant List.

• Aa (plant) on Wikipedia.Wikipedia
• Aa (Orchidaceae) on Wikispecies.Wikispecies
• Aa (Orchidaceae) on Wikimedia Commons.Wikimedia Commons
• Aa at the Catalogue of Life 
• Aa at Encyclopedia of Life
• Aa at National Center for Biotechnology Information
• Aa at The Plant List

Perhaps from Hawaiian ʻaʻā. This etymology is incomplete. You can help Wiktionary by elaborating on the origins of this term.

Aa f

1. A taxonomic subgenus within the family Euconulidae – Philonesia (Aa), a group of snails.

• (subgenus): Stylommatophora - order; Helicina - suborder; Limacoidei - infraorder; Trochomorphoidea - superfamily; Euconulidae - family; Microcystinae - subfamily; Philonesia - genus

• (subgenus): For species see Aa (ICZN) on Wikispecies.Wikispecies

• Aa (ICZN) on Wikispecies.Wikispecies

The river names are ostensibly from Proto-West Germanic *ahu (“river”).

Aa

1. Several waterways in Europe.
   1. A river in northern France, flowing 93 km from near Bourthes, Pas-de-Calais department into the North Sea near Gravelines, Nord department.
   2. A small river in the Netherlands, flowing 72 km from near Nederweert, Limburg into the Dieze at 's-Hertogenbosch, North Brabant.
   3. A tributary of the Möhne river in North Rhine-Westphalia, Germany, part of the Rhine basin.
   4. A tributary of the Nether river in North Rhine-Westphalia, Germany, part of the Weser basin.
   5. A tributary of the Werre river in North Rhine-Westphalia, Germany, part of the Weser basin.
2. A village in Ida-Viru County, northern Estonia, on the Gulf of Finland.
3. A surname from Norwegian.

• Aa in the Encyclopædia Britannica (11th edition, 1911)

The word a (also aa), used as a hydronym. From Proto-Germanic *ahwō (“waters, river”), from Proto-Indo-European *h₂ekʷeh₂ (“water”); both natively, and through Dutch Low Saxon Aa and German Low German Aa (both from Old Saxon aha (“stream”)), and German Aa (from Old High German aha (“stream”)). For more information, see a and its cognate English ea.

• IPA^(key): /aː/

• Audio

  (file)

• Hyphenation: Aa
• Rhymes: -aː

Aa f

1. The name of dozens of small rivers and streams; also a common element in many derived hydronyms.

• Drentse Aa

• Ee

• Aa (waternaam) on the Dutch Wikipedia.Wikipedia ^nl

Onomatopoeic, compare also Kacke.

• IPA^(key): /ˈʔa.ʔa/, /ʔaˈʔa/
• In this word the glottal stop is strictly phonemic and can never be omitted.

• Audio

  (file)

Aa n (strong, genitive Aa or Aas, no plural)

1. (childish or parentese) feces, poop

• A-a

• Aa machen

(This etymology is missing or incomplete. Please add to it, or discuss it at the Etymology scriptorium.)

• IPA^(key): /aː/

die Aa f (proper noun, usually definite, definite genitive der Aa)

1. A left tributary of the Möhne, North Rhine-Westphalia, Germany
2. A left tributary of the Nethe, North Rhine-Westphalia, Germany
3. A left tributary of the Herre, North Rhine-Westphalia, Germany
4. any of several other rivers in Germany, France, Switzerland, Estonia, Latvia, Lithuania, the Netherlands and Belgium

Aa m or f (proper noun, surname, masculine genitive Aas or (with an article) Aa, feminine genitive Aa, plural Aas)

1. a surname

Aa f

1. obsolete typography of å