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Having the form of a hair.

[Latin pilus, hair + -form.]
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.


(Botany) botany resembling a long hair
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014


(ˈpɪl əˌfɔrm)

having the form of a hair; resembling hair.
[1820–30; < New Latin piliformis. See pilus, -i-, -form]
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
References in periodicals archive ?
1 and 2) with vestiture of vertex appressed with piliform scales; frons with elongate scales; ocelli absent [Meyrick (1905) erroneously stated that Stachyotis possessed ocelli on the head]; antenna filiform in both sexes; flagellomere with 2 whorls of elongate scales; labial palpus slightly upcurved, 1st segment 2 x as long as 2nd, 2nd segment as long as 3rd; maxillary palpus 4-segmented; proboscis naked.
Diagnosis: head with white and black scales, palps with brownish and whitish mixed scales, with piliform scales in the outer border, inner border with white piliform scales, antennae biserrate, eyes ciliate, vertex with whitish, blackish and with scales and the black line across, tegulae and patagiae covered with white mixed with dark brown and brownish scales and piliform scales.
Anteroventral margin of front femur type [B.sub.3], meaning 5 proximal stout spines succeeded by a row of piliform spinules of uniform length, terminating in 3 large spines increasing in size distally; pulvilli present only on 4th tarsomere, tarsal claws symmetrical and unspecialized, simple and arolia present; foretarsus with the first tarsomere and other 4 tarsomeres about same length, but the first tarsomeres of middle and hind tarsi both distinctly longer than other 4 tarsomeres.