retractile

Example Sentences

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The thoracic vertebrae number 13; the feet are digitigrade, with five front and four hind toes, of which the claws are retractile; and the metatarsus is haired all round.

From Encyclopaedia Britannica, 11th Edition, Volume 5, Slice 4 "Carnegie Andrew" to "Casus Belli" by Various

Mantle oval, covering the head and the greater part of the body; anterior tentacles, ill-developed; branchiae generally retractile.

From Encyclopaedia Britannica, 11th Edition, Volume 11, Slice 5 "Gassendi, Pierre" to "Geocentric" by Various

The genital somite is always small and sometimes retractile within the somite bearing the last pair of legs.

From Encyclopaedia Britannica, 11th Edition, Volume 5, Slice 6 "Celtes, Konrad" to "Ceramics" by Various

Sem′i-recon′dite, half-hidden; Sem′i-rē′flex, involuntarily performed, but not entirely independent of the will; Sem′i-reg′ular, pertaining to a quadrilateral having four equal sides, but only pairs of equal angles; Sem′i-retrac′tile, retractile to some extent.—n.

From Chambers's Twentieth Century Dictionary (part 4 of 4: S-Z and supplements) by Various

There is also in some genera a median retractile sensory papilla on the dorsal posterior surface above the rectum, not covered by the cuticle.

From Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 2 "Chicago, University of" to "Chiton" by Various