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Related to principal parts: adverb
In traditional grammars of inflected languages, the forms of the verb that are considered basic and from which all other forms of the verb are derived. In English, the principal parts are the present infinitive (play, eat, put), the past tense (played, ate, put), the present participle (playing, eating, putting), and the past participle (played, eaten, put).
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
1. (Grammar) grammar the main inflected forms of a verb, from which all other inflections may be deduced. In English they are generally considered to consist of the third person present singular, present participle, past tense, and past participle
2. (Mathematics) the sides and interior angles of a triangle
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
a set of inflected forms of a verb from which all the other inflected forms can be derived, as sing, sang, sung or smoke, smoked: sometimes considered to include the present participle, as singing or smoking.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
pl (Gram: of verb) → Stammformen pl
Collins German Dictionary – Complete and Unabridged 7th Edition 2005. © William Collins Sons & Co. Ltd. 1980 © HarperCollins Publishers 1991, 1997, 1999, 2004, 2005, 2007
principal partsnpl (Gram) → paradigma msg
Collins Italian Dictionary 1st Edition © HarperCollins Publishers 1995