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单词 pollex
释义

Definition of pollex in English:

pollex

nounPlural pollices ˈpɒlɛksˈpɑlˌɛks
Anatomy Zoology
  • The innermost digit of a forelimb, especially the thumb in primates.

    〔剖,动〕指节;(尤指灵长动物的)拇指

    Example sentencesExamples
    • Four clawed digits are found on each forefoot (the pollex or ‘thumb’ is small and bears a nail); the hind foot in most has five clawed digits (but sometimes the hallux or first toe has a nail).
    • The eyes are usually very small, the feet are plantigrade and have five digits, and neither the hallux or pollex is opposable.
    • All eusauropods, in contrast, are characterized by a shortened manus in which each digit bears two or fewer phalanges, and only the pollex bears an ungual.
    • The first dorsal has been found divided into two, one part going to the pollex and one to the index; this is a very rare anomaly, not occurring more often than once in 120 subjects.
    • The forefeet and hindfeet have 3 large digits; the pollex and hallux are reduced in size or absent and the fifth finger is very small.

Origin

Mid 19th century: from Latin, literally 'thumb or big toe'.

Definition of pollex in US English:

pollex

nounˈpɑlˌɛksˈpälˌeks
Anatomy Zoology
  • The innermost digit of a forelimb, especially the thumb in primates.

    〔剖,动〕指节;(尤指灵长动物的)拇指

    Example sentencesExamples
    • Four clawed digits are found on each forefoot (the pollex or ‘thumb’ is small and bears a nail); the hind foot in most has five clawed digits (but sometimes the hallux or first toe has a nail).
    • The forefeet and hindfeet have 3 large digits; the pollex and hallux are reduced in size or absent and the fifth finger is very small.
    • The eyes are usually very small, the feet are plantigrade and have five digits, and neither the hallux or pollex is opposable.
    • The first dorsal has been found divided into two, one part going to the pollex and one to the index; this is a very rare anomaly, not occurring more often than once in 120 subjects.
    • All eusauropods, in contrast, are characterized by a shortened manus in which each digit bears two or fewer phalanges, and only the pollex bears an ungual.

Origin

Mid 19th century: from Latin, literally ‘thumb or big toe’.

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更新时间:2025/7/5 19:05:16