Oxford University Press has removed words like "aisle", "bishop", "chapel", "empire" and "monarch" from its Junior Dictionary and replaced them with words like "blog", "broadband" and "celebrity". Dozens of words related to the countryside have also been culled.
The publisher claims the changes have been made to reflect the fact that Britain is a modern, multicultural, multifaith society.
But academics and head teachers said that the changes to the 10,000 word Junior Dictionary could mean that children lose touch with Britain's heritage.
"We have a certain Christian narrative which has given meaning to us over the last 2,000 years. To say it is all relative and replaceable is questionable," said Professor Alan Smithers, the director of the centre for education and employment at Buckingham University. "The word selections are a very interesting reflection of the way childhood is going, moving away from our spiritual background and the natural world and towards the world that information technology creates for us."
An analysis of the word choices made by the dictionary lexicographers has revealed that entries from "abbey" to "willow" have been axed. Instead, words such as "MP3 player", "voicemail" and "attachment" have taken their place.
Lisa Saunders, a worried mother who has painstakingly compared entries from the junior dictionaries, aimed at children aged seven or over, dating from 1978, 1995, 2000, 2002, 2003 and 2007, said she was "horrified" by the vast number of words that have been removed, most since 2003.
"The Christian faith still has a strong following," she said. "To eradicate so many words associated with the Christianity will have a big effect on the numerous primary schools who use it."
Words taken out:
Carol, cracker, holly, ivy, mistletoe
Dwarf, elf, goblin
Abbey, aisle, altar, bishop, chapel, christen, disciple, minister, monastery, monk, nun, nunnery, parish, pew, psalm, pulpit, saint, sin, devil, vicar
Coronation, duchess, duke, emperor, empire, monarch, decade
adder, ass, beaver, boar, budgerigar, bullock, cheetah, colt, corgi, cygnet, doe, drake, ferret, gerbil, goldfish, guinea pig, hamster, heron, herring, kingfisher, lark, leopard, lobster, magpie, minnow, mussel, newt, otter, ox, oyster, panther, pelican, piglet, plaice, poodle, porcupine, porpoise, raven, spaniel, starling, stoat, stork, terrapin, thrush, weasel, wren.
Acorn, allotment, almond, apricot, ash, bacon, beech, beetroot, blackberry, blacksmith, bloom, bluebell, bramble, bran, bray, bridle, brook, buttercup, canary, canter, carnation, catkin, cauliflower, chestnut, clover, conker, county, cowslip, crocus, dandelion, diesel, fern, fungus, gooseberry, gorse, hazel, hazelnut, heather, holly, horse chestnut, ivy, lavender, leek, liquorice, manger, marzipan, melon, minnow, mint, nectar, nectarine, oats, pansy, parsnip, pasture, poppy, porridge, poultry, primrose, prune, radish, rhubarb, sheaf, spinach, sycamore, tulip, turnip, vine, violet, walnut, willow
Words put in:
Blog, broadband, MP3 player, voicemail, attachment, database, export, chatroom, bullet point, cut and paste, analogue
Celebrity, tolerant, vandalism, negotiate, interdependent, creep, citizenship, childhood, conflict, common sense, debate, EU, drought, brainy, boisterous, cautionary tale, bilingual, bungee jumping, committee, compulsory, cope, democratic, allergic, biodegradable, emotion, dyslexic, donate, endangered, Euro
Apparatus, food chain, incisor, square number, trapezium, alliteration, colloquial, idiom, curriculum, classify, chronological, block graph