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Kootenai, indigenous group of North America

(Encyclopedia)Kootenai ko͞otˈənāˌ [key], group of Native North Americans who in the 18th cent. occupied the so-called Kootenai country (i.e., N Montana, N Idaho, and SE British Columbia). Their language is tho...

Pentecost

(Encyclopedia)Pentecost pĕnˈtəkôst [key] [Gr.,=fiftieth], important Jewish and Christian feast. The Jewish feast of Pentecost, in Hebrew Shavuot, the Feast of Weeks, one of the three pilgrimage festivals, arose...

Ruisdael, Jacob van

(Encyclopedia)Ruisdael or Ruysdael, Jacob van both: yäˈkōp vän roisˈdäl [key], c.1628–1682, Dutch painter and etcher, the most celebrated of the Dutch landscape painters. He studied with his father Isack an...

nursery

(Encyclopedia)nursery, in horticulture, an establishment or area for the propagation, breeding, and early cultivation of plants. In North America the term nursery originally specified a place where hardy woody plan...

sonnet

(Encyclopedia)sonnet, poem of 14 lines, usually in iambic pentameter, restricted to a definite rhyme scheme. There are two prominent types: the Italian, or Petrarchan, sonnet, composed of an octave and a sestet (rh...

audiovisual education

(Encyclopedia)audiovisual education, educational instruction by means of materials that use the senses of sight and hearing to stimulate and enrich learning experiences. The successful use of motion pictures and ot...

Haida

(Encyclopedia)Haida hīˈdə [key], Native North Americans living primarily on the Queen Charlotte Islands, off British Columbia, and on the southern end of the Prince of Wales Island, off Alaska. They speak the Ha...

Easter

(Encyclopedia)Easter [A.S. Eastre, name of a spring goddess], chief Christian feast, commemorating the resurrection of Jesus after his crucifixion. In the West, Easter is celebrated on the Sunday following the full...

Donatism

(Encyclopedia)Donatism dŏnˈətĭzəm [key], schismatic movement among Christians of N Africa (fl. 4th cent.), led by Donatus, bishop of Casae Nigrae (fl. 313), and the theologian Donatus the Great or Donatus Magn...

combinatorics

(Encyclopedia)combinatorics kŏmˌbĭnətôrˈēəl [key], sometimes called the science of counting, the branch of mathematics concerned with the selection, arrangement, and operation of elements within sets. Combi...