Anthemis nobilis
— Noun
– English
～ Eurasian plant with apple-scented foliage and white-rayed flowers and feathery leaves used medicinally; in some classification systems placed in genus Anthemis
atrioventricular node
— Noun
– English
～ a node of specialized heart muscle located in the septal wall of the right atrium; receives impulses from the sinoatrial node and transmits them to atrioventricular bundle
ascending node
— Noun
– English
～ the point at which an orbit crosses the ecliptic plane going north
axillary node
— Noun
– English
～ any of the lymph glands of the armpit; fights infections in the neck and chest and arm regions
Ascophyllum nodosum
— Noun
– English
～ similar to and found with black rockweed
age norm
— Noun
– English
～ the average age at which particular performances are expected to appear
anglo-norman
— Noun
– English
～ the French (Norman) language used in medieval England
Andre Le Notre
— Noun
– English
～ French landscape gardener who designed many formal gardens including the parks of Versailles (1613-1700)
aleph-nought
— Noun
– English
～ the smallest infinite integer
art nouveau
— Noun
– English
～ a French school of art and architecture popular in the 1890s; characterized by stylized natural forms and sinuous outlines of such objects as leaves and vines and flowers
Aster novae-angliae
— Noun
– English
～ common perennial of eastern North America having showy purplish flowers; a parent of the Michaelmas daisy
Aster novi-belgii
— Noun
– English
～ North American perennial herb having small autumn-blooming purple or pink or white flowers; widely naturalized in Europe
Alfred Noyes
— Noun
– English
～ English poet (1880-1958)
amygdaloid nucleus
— Noun
– English
～ an almond-shaped neural structure in the anterior part of the temporal lobe of the cerebrum; intimately connected with the hypothalamus and the hippocampus and the cingulate gyrus; as part of the limbic system it plays an important role in motivation and emotional behavior
Aralia nudicaulis
— Noun
– English
～ common perennial herb having aromatic roots used as a substitute for sarsaparilla; central and eastern North America
attractive nuisance
— Noun
– English
～ anything on your premises that might attract children into danger or harm; "their swimming pool is an attractive nuisance; they should fence it in"
abatable nuisance
— Noun
– English
～ a nuisance that can remedied (suppressed or extinguished or rendered harmless); "the continued existence of an abatable nuisance is not authorized under the law"
aleph-null
— Noun
– English
～ the smallest infinite integer
algebraic number
— Noun
– English
～ root of an algebraic equation with rational coefficients