Term: narrow gauge: a railroad track (or its width) narrower than the standard 56.5 inches
Broader: size: the physical magnitude of something (how big it is) | Unrelated: seminal vesicle: either of a pair of glands located on either side of the male urinary bladder that open into the vas deferens and that secrete many components of semen during ejaculation
Broader: size: the physical magnitude of something (how big it is) | Unrelated: visible speech: spectrogram of speech; speech displayed spectrographically
Broader: size: the physical magnitude of something (how big it is) | Unrelated: convention: the act of convening
Broader: size: the physical magnitude of something (how big it is) | Unrelated: dactyl: a metrical unit with stressed-unstressed-unstressed syllables
Broader: size: the physical magnitude of something (how big it is) | Unrelated: sect: a subdivision of a larger religious group
Broader: size: the physical magnitude of something (how big it is) | Unrelated: fetal membrane: any membrane that functions for the protection or nourishment or respiration or excretion of a developing fetus
Broader: size: the physical magnitude of something (how big it is) | Unrelated: spiel: plausible glib talk (especially useful to a salesperson)
Broader: size: the physical magnitude of something (how big it is) | Unrelated: citellus: typical ground squirrels
Broader: size: the physical magnitude of something (how big it is) | Unrelated: brush-off: a curt or disdainful rejection
Broader: size: the physical magnitude of something (how big it is) | Unrelated: alcoholic: a person who drinks alcohol to excess habitually