acmaeas
plural of acmaea

acme
A high point: the highest point of any range, the most developed stage of any process, or the culmination of any field or historical period.
A paragon: a person or thing representing such a high point.
Full bloom or reproductive maturity.
Sexual orgasm.
Synonym of crisis, the decisive moment in the course of an illness.
Alternative letter-case form of Acme, particularly as a threading format.

acmes
plural of acme

aconitia
aconitine.

acra
The vascular areas of the body most removed from the heart.

actinula
A kind of larva of certain hydroids (Tubularia).

actinulae
plural of actinula

admanuensis
In old English law, one taking a corporal oath, that is, by laying the hand on the Bible, in distinction from one taking the oath in other forms, or affirming.

agate snail
A snail of species Achatina achatina.

agerasia
An outward appearance more youthful than one's true age.

aggrecanolysis
The lysis of aggrecans, typically by means of an aggrecanase

ahamkaras
plural of ahamkara

ahankaras
plural of ahankara

albanites
plural of albanite

algerites
plural of algerite

alikreukel
giant periwinkle, Turbo sarmaticus

alipta
An official responsible for training and anointing athletes for the games.

aliptae
plural of alipta

aliptas
plural of alipta

allo
Alternative spelling of 'allo (“hello”).

allos
plural of allo

alula
A small projection of three or four feathers on the first digit of the wing on some birds.

alulae
plural of alula

alulas
plural of alula

amalthea
An aggregation of dry fruits within a calyx which does not become fleshy, as in Alchemilla or Sanguisorba.

ambages
Indirect or roundabout ways of talking; circumlocution.
Indirect or roundabout routes or directions.

ambersnails
plural of ambersnail

ammonid
Synonym of ammonite.

ammonids
plural of ammonid

ammonite
Any of an extinct group of cephalopods of the subclass Ammonoidea; a fossil shell of such an animal.

ammonitella
The initial part of a spiral shell, originating from a central chamber, in ammonoid molluscs

ammonitellas
plural of ammonitella

ammonites
plural of ammonite

ammonoid
An extinct cephalopod of the subclass †Ammonoidea (including ammonites).

ammonoids
plural of ammonoid

ampulla
An Ancient Roman two-handled vessel.
A vessel for containing consecrated wine or oil.
The dilated end of a duct.
The spongiole of a root.

ampullae
plural of ampulla

ampullas
plural of ampulla

amygdala
Each one of the two regions of the brain, located as a pair in the medial temporal lobe, believed to play a key role in processing emotions, such as fear and pleasure, in both animals and humans.

amygdalae
plural of amygdala

amygdalas
plural of amygdala

amyloidolysis
The enzymatic breakup (hydrolysis) of amyloids

anadromus
Alternative form of anadromous.

anaptychi
plural of anaptychus

anaptychus
One of a pair of shelly plates found in some cephalopods, such as the ammonites. They are now considered to have been parts of the jaw.

anceps
A syllable that can be either short or long.

ancilla
A maid.
An auxiliary or accessory
An ancilla bit

ancillae
plural of ancilla

ancipites
plural of anceps

ancylids
plural of ancylid

andesites
plural of andesite

angaria
Alternative form of angary.

angarias
plural of angaria

angel wing
A kind of mollusk; a piddock.
A disease of waterfowl in which the last joint of the wing becomes twisted, causing the wing feathers to point laterally outwards; a wing of this kind.

angelus
Alternative form of Angelus.

angeluses
plural of angelus

angelwing
Alternative form of angel wing.

angelwings
plural of angelwing

anglesites
plural of anglesite

angulus
An angle or corner, such as the angular portion of the stomach between the lesser curvature and the pylorus.

anna
A former Indian coin.

annas
plural of anna

annoe
Obsolete form of anna (“unit of currency in former British India”).

annoes
plural of annoe

anodon
Any of the genus Anodon, now Anodonta, of freshwater bivalves.

anodons
plural of anodon

anodontia
The congenital absence of some or all primary or permanent teeth, caused by a rare genetic disorder.

anodontias
plural of anodontia

anomia
The inability to remember names.
The difficulty in finding the right word.

anomias
plural of anomia

anopsia
A defect in the visual field

anopsias
plural of anopsia

anopsy
Dated form of anopsia.

anticlimax
A failed or reverse climax, particularly
A failed or reverse climax
A failed or reverse climax

anticlimaxes
plural of anticlimax

anticorona
The glory optical phenomenon.

anticoronas
plural of anticorona

anticyclolysis
The weakening or termination of anticyclonic circulation in the atmosphere.

antidactylus
An anapest

antihypertriton
The antiparticle equivalent of a hypertriton, consisting of an antiproton, an antineutron and any antihyperon

antihypertritons
plural of antihypertriton

antilysis
The inhibition of lysis

antistrophon
A counterargument as a retort

anxiolysis
The reduction of anxiety by means of sedation or hypnosis

apella
The popular deliberative assembly in the Ancient Greek city-state of Sparta, corresponding to the ecclesia in most other Greek states.

apellai
An initiation family-festival which was dedicated to Apollo

apex
The highest or the greatest part of something, especially forming a point.
The highest or the greatest part of something, especially forming a point.
The highest or the greatest part of something, especially forming a point.
The highest or the greatest part of something, especially forming a point.
The highest or the greatest part of something, especially forming a point.
The highest or the greatest part of something, especially forming a point.
The highest or the greatest part of something, especially forming a point.
The highest or the greatest part of something, especially forming a point.
The highest or the greatest part of something, especially forming a point.
The highest or the greatest part of something, especially forming a point.
The highest or the greatest part of something, especially forming a point.
The highest or the greatest part of something, especially forming a point.
The highest or the greatest part of something, especially forming a point.
An obstacle for a horse to jump over, consisting of a triangular corner fence.
The moment of greatest success, expansion, etc.
The top of the food chain.
A conical priest cap.

apexes
plural of apex

apices
plural of apex

aplysia
Any sea slug of the genus Aplysia.

aplysias
plural of aplysia

apodoses
plural of apodosis

apodosis
The consequential clause in a conditional sentence.

apple snail
Any of the large freshwater snails of the family Ampullariidae, some of which are the size of an apple.

arabica
A plant of species Coffea arabica, native to Ethiopia, that yields coffee beans.
A bean of this plant.
Coffee made from these coffee beans.

arabicas
plural of arabica

arc-form pearly mussel
Epioblasma arcaeformis, an extinct species of freshwater mussel.

architeuthis
A giant squid (genus Architeuthis).

arculus
A crossvein between the radius and cubitus near the base of the wing in certain insects

arene
Any monocyclic or polycyclic aromatic hydrocarbon.

arenes
plural of arene

arhinia
Alternative form of arrhinia.

ark
A large box with a flat lid.
The ship built by Noah to save his family and a collection of animals from the deluge; Noah's ark.
Something affording protection; safety, shelter, refuge.
The body as a vessel.
A spacious type of boat with a flat bottom.
The Ark of the Covenant.
A decorated cabinet at the front of a synagogue, in which Torah scrolls are kept.

ark shells
plural of ark shell

arke
Obsolete form of ark.

arks
plural of ark

armadillo
Any of the burrowing mammals covered with bony, jointed, protective plates, families Dasypodidae and Chlamyphoridae in the order Cingulata, found in the Americas, especially in South America.

armadilloes
plural of armadillo

armadillos
plural of armadillo